| S | stere |
| S&A | safe and arm |
| S&A | science and application |
| S&AD | Science and Applications Directorate |
| S&C | stabilization and control |
| S&E | Science and Engineering (MSFC directorate) |
| S&E | sensors and effectors |
| S&H | sample and hold |
| S&MST | space and missile system test |
| S&PA | safety and product assurance |
| S&SED | Satellite and Space Electronics Division (Rockwell) |
| S* | second (astronomical tables) |
| S- | Saturn stage (followed by Roman numeral) |
| S-ASKR | semiactive seeker |
| S-E | survivability-endurance |
| S-N | stress number |
| S-O | shutoff |
| S/A | safe and arm |
| S/A | scheduled/actual |
| S/A | site activation |
| S/A | solar array |
| S/A | spacecraft adapter |
| S/A | subaccount |
| S/A | subassembly |
| S/A | supplemental agreement |
| S/A | swing arm |
| S/AC | stabilization/attitude control |
| S/B | serial block |
| S/B | standby |
| S/C | security code |
| S/C | sensor/controller |
| S/C | signal conditioner |
| S/C | software contractor |
| S/C | spacecraft |
| S/C | splitter/combiner |
| S/C | stabilization and control |
| S/C | strip chart (recorder) |
| S/C | subcontractor |
| S/CO | spacecraft observer |
| S/DG | strap-down gyro |
| S/E | service equipment |
| S/EOS | standard Earth observation satellite |
| S/F | safety factor |
| S/F | single flow |
| S/F | static firing |
| S/G | salary grade |
| S/G | strain gauge |
| S/I | system integration |
| S/L | shop laboratory |
| S/L | space laboratory |
| S/M | scheduled maintenance |
| S/M | service module |
| S/M | service/maintenance |
| S/M | systems management |
| S/N | serial number |
| S/N | service note |
| S/N | signal-to-noise ratio |
| S/O | shutoff |
| S/O | switchover |
| S/P | serial to parallel |
| S/P | signal processor |
| S/R | send and receive |
| S/R | shift register |
| S/R | stimulus/response |
| S/S | signal strength |
| S/S | single side band |
| S/S | subsystem |
| S/U | setup |
| S/V | space vehicle |
| S/V | supply valve |
| S/V | survivability/vulnerability |
| S/VAR | survivability/vulnerability analysis report |
| S/W | software |
| S3 | sortie support system |
| S3/E | SBKEW system simulator/emulator |
| S3E | SABIR system simulator/emulator |
| SA | safing area |
| SA | selective availability |
| SA | shaft angle |
| SA | shop aid |
| SA | signature analysis |
| SA | single access |
| SA | site activation |
| SA | solar array |
| SA | spectrum analyzer |
| SA | structural analyzer (computer program) |
| SA | subaccount |
| SA | supplemental agreement |
| SA | support area |
| SA | swing arm |
| SA&I | Systems Analysis and Integration (MSFC) |
| SAA | science and applications mission |
| SAA | south Atlantic anomaly |
| SAAC | schedule allocation and control |
| SAALC | San Antonio Air Logistics Center |
| SAAS | Shuttle aerospace actuator simulator |
| SAAX | science and applications mission |
| SAB | Satellite Assembly Building |
| SAB | Shuttle Assembly Building |
| SAB | Spacecraft Assembly Building |
| SAB | Storage and Assembly Building |
| SAB | source approval bulletin |
| SABIR | space-based interceptor |
| SABS | shared-aperture boresight sensor |
| SAC | Space Applications Corporation |
| SAC | Strategic Air Command |
| SAC | Support Action Center |
| SAC | sequencing and application controller |
| SACCS | SAC automated command control system |
| SACEUR | Supreme Allied Commander, Europe |
| SACS | software avionics command support |
| SACTO | Sacramento Test Operations |
| SAD | Shuttle authorized document |
| SAD | spacecraft attitude display |
| SAD | special adapter device |
| SAD | system allocation document |
| SADEC | spin axis declination |
| SADPT | solar array drive and power transfer |
| SADT | structured analysis and design technique |
| SADT | systems analysis and design technique |
| SAE | Society of Automotive Engineers |
| SAE | shaft angle encoded |
| SAEF | Spacecraft Assembly and Encapsulation Facility (KSC) |
| SAF | Secretary of the Air Force |
| SAF | secured access facility |
| SAF | spacecraft assembly facility |
| SAF | special-access facility |
| SAFE | San Andreas Fault experiment |
| SAFE | safing and failure detection expert |
| SAFSP | Secretary of the Air Force Special Projects |
| SAGE | semiautomatic ground environment |
| SAGE | stratospheric aerosol gas experiment |
| SAIC | Science Applications International Corporation |
| SAIC | Scientific Applications Instrumentation Corporation |
| SAID | Shuttle authorized item document |
| SAIL | Shuttle Avionics Integration Laboratory |
| SAINT | satellite interceptor program |
| SAIP | spares acquisition integrated with production |
| SAJ | subassembly jig |
| SAL | San Salvador Island |
| SAL | Shuttle Avionics Laboratory |
| SAL | Supersonic Aerophysics Laboratory |
| SAL | scientific airlock |
| SAL | strategic arms limitation |
| SALC | Sacramento Air Logistics Center |
| SALT | Strategic Arms Limitation Talks |
| SALT | standard analysis language translator |
| SAM | School of Aerospace Medicine (Air Force) |
| SAM | Shuttle attachment manipulator |
| SAM | special air mission |
| SAM | supportability assessment model |
| SAM | surface-to-air missile |
| SAM | system activation and monitoring |
| SAMP | Shuttle automated mass properties |
| SAMS | Shuttle altitude measuring system |
| SAMS | Shuttle attached manipulator system |
| SAMS | Space Acceleration Measurement System |
| SAMTEC | Space and Missile Test Center (VAFB, California) |
| SAMTECM | Space and Missile Test Center Manual |
| SAMTO | Space and Missile Test Organization |
| SAND | site activation need data |
| SANDAC | Sandia airborne computer guidance system |
| SANGUINE | Navy ELF network |
| SANS | stellar autonomous navigation system |
| SAP | strain arrester plate |
| SAPMD | stand-alone pressure measurement device |
| SAR | safety analysis report |
| SAR | search and rescue |
| SAR | site action request |
| SAR | special access required |
| SAR | special action request |
| SAR | special action requirement |
| SAR | storage address register |
| SAR | subsequent applications review |
| SAR | summary analysis report |
| SAR | support action request |
| SAR | synthetic-aperture radar |
| SAR | system assessment review |
| SARAH | search and range homing |
| SARP | Shuttle astronaut recruitment program |
| SARP | safety analysis report for packaging |
| SARP | small autonomous research package |
| SART | stimuli analog refresh table |
| SAS | software approval sheet |
| SAS | software automation subpanel |
| SAS | solar array simulator |
| SAS | solar array system |
| SAS | stability augmentation subsystem |
| SAS | surveillance architecture study |
| SASCB | Shuttle Avionics Software Control Board |
| SASE | standards analysis, synthesis, and expression |
| SASR | Shuttle avionics status review |
| SASR | Shuttle avionics system review |
| SASS | spectral agile sensor system |
| SASTP | stand-alone self-test program |
| SAT | static air temperature |
| SAT | surveillance, acquisition, and tracking |
| SAT | systems approach to training |
| SATAF | Shuttle Activation Task Force |
| SATAF | Site Activation Task Force |
| SATCOM | satellite communications |
| SATCON | satellite connectivity simulation |
| SATE | semiautomatic test equipment |
| SATKA | surveillance, acquisition, tracking, and kill assessment |
| SATO | Shuttle attached teleoperator |
| SATO | supply and transportation operations |
| SATPLAN | satellite assessment tool |
| SATS | Shuttle avionics test set |
| SATS | Shuttle avionics test station |
| SATS | small applications technology satellite |
| SATS | station accommodation test site |
| SATS | supplier assessment tracking system |
| SATS | supply and transportation support |
| SATSIM | satellite target sensing simulation |
| SAU | strap-around unit |
| SAU&SE | SDI systems architecture utility and survivability |
| SAV-D | Space Shuttle display development compiler |
| SAW | satellite attack warning |
| SAW/V | satellite attack warning/verification |
| SAWBOC | system analysis with blockout considerations |
| SB | small business |
| SB | space base |
| SB | speed brake |
| SB | synchronization base |
| SB | synchronization bit |
| SB/M | switchable bandpass/mirror |
| SB/SDB | small business/small disadvantaged business |
| SBA | Small Business Administration |
| SBA | seat-back assembly |
| SBA | structure-borne acoustic |
| SBA | switchable beam antenna |
| SBAS | S-band antenna switch |
| SBCR | stock balance and consumption report |
| SBD | schematic block diagram |
| SBDEW | space-based, directed-energy weapon |
| SBDEWSIM | space-based, directed-energy weapon simulation |
| SBE | sub-bit encoder |
| SBFS | Space Businesses Financial Services |
| SBHC | speed brake hand controller |
| SBI | space-based interceptor |
| SBKEW | space-based kinetic-energy weapon |
| SBKEWS | space-based kinetic-energy weapon system |
| SBKKV | space-based kinetic kill vehicle |
| SBKKVWS | space-based kinetic kill vehicle weapon system |
| SBL | space-based laser |
| SBLIP | Space-Based Laser Intercept Program |
| SBM | strategic ballistic missile |
| SBMS | space-based battle manager satellite |
| SBMS | spaceborne battle management satellite |
| SBNPB | space-based neutral particle beam |
| SBNWS | Seal Beach Naval Weapons Station |
| SBOTV | space-based OTV |
| SBP | San Luis Obispo (TACAN station) |
| SBP | Strategic Business Plan |
| SBP | sonic boom panel |
| SBPA | S-band power amplifier |
| SBR | space-based radar |
| SBS | satellite business system |
| SBS | scientific business satellite |
| SBSS | space-based space surveillance |
| SBSS | space-based surveillance system |
| SBTC | speed brake/thrust controller |
| SBTO | speed brake takeover |
| SBUE | switch backup entry |
| SBX | S-band transponder |
| SC | Science Center |
| SC | separation and control |
| SC | service charge |
| SC | signal conditioner |
| SC | single contact |
| SC | software change |
| SC | spacecraft |
| SC | statement of capability |
| SC | statement of compatibility |
| SC | superimposed current |
| SC | support contractor |
| SC | surface command |
| SC | system characterization |
| SC | system concept |
| SC/SM | spacecraft systems monitor |
| SC/TC | spacecraft test conductor |
| SCA | SDI communications architecture |
| SCA | Service Contract Act |
| SCA | Shuttle carrier aircraft |
| SCA | schedule change authorization |
| SCA | sequence control area |
| SCA | sequence control assembly |
| SCA | simulation control area |
| SCA | sneak circuit analysis |
| SCA | software command analysis |
| SCA | system controller assembly |
| SCAMA | station conferencing and monitoring agreement |
| SCAN | Shuttle connector analysis network |
| SCAN | selected current aerospace notice |
| SCAP | Shuttle configuration analysis program |
| SCAPE | self-contained atmosphere protective ensemble |
| SCAR | safety change assessment report |
| SCARS | serialized control and record system |
| SCARS | sneak-circuit analysis report summary |
| SCAT | space communication and tracking |
| SCAT | storage, checkout, and transport |
| SCAT | system commonality analysis tool |
| SCATS | simulation control and training system |
| SCATS | simulation, checkout, and tracking system |
| SCB | Schedule Control Board |
| SCB | Selection Control Board |
| SCB | Software Control Board |
| SCB | Specification Control Board |
| SCB | selector control box |
| SCB | steering control box |
| SCBD | seller's configuration baseline document |
| SCC | Safety Control Center |
| SCC | Scientific Computing Center |
| SCC | Simulation Control Center |
| SCC | Standing Consultative Commission |
| SCC | System Control Center |
| SCC | secondary control code |
| SCC | simulation configuration control |
| SCCB | Site Configuration Control Board |
| SCCB | Software Change Control Board |
| SCCB | Software Configuration Control Board |
| SCCC | Spacecraft Command and Control Center |
| SCCE | signal conditioning control electronics |
| SCD | SCM comparison display |
| SCD | source control drawing |
| SCD | specification change drawing |
| SCD | specification control document |
| SCD | specification control drawing |
| SCD | system concept definition |
| SCDP | simulation control data package |
| SCDR | Shuttle critical design review |
| SCDR | seller critical design review |
| SCDR | software critical design review |
| SCDR | subcontractor critical design review |
| SCDS | secure central data subsystem |
| SCDU | signal conditioning and display unit |
| SCE | Space Transportation System cargo element |
| SCE | signal conditioning equipment |
| SCE | sortie cargo element |
| SCEA | signal conditioning electronics assembly |
| SCF | Satellite Control Facility |
| SCF | Sunnyvale Control Facility |
| SCF | sequence compatibility firing |
| SCF | spacecraft control facility |
| SCG | Security Classification Guide |
| SCGSS | supercritical gas storage system |
| SCI | seller configuration inspection |
| SCI | sensitive compartmented information |
| SCI | software customer inspection |
| SCI | switch closure in |
| SCIF | sensitive compartmented information facility |
| SCIM | Shuttle cargo integration manager |
| SCIP | Shuttle cargo integration plan |
| SCIP | self-contained instrument package |
| SCIT | standard change integration and tracking |
| SCIT | system concept and integrated technology |
| SCIU | selector control interface unit |
| SCIU | sortie control interface unit |
| SCL | safety checklist |
| SCL | secondary coolant line |
| SCL | secondary coolant loop |
| SCL | specification change log |
| SCLM | stability, control, and load maneuver |
| SCM | schedule/configuration management |
| SCM | software configuration management |
| SCM | software configuration manager |
| SCM | system (subsystem) configuration management |
| SCM | system configuration monitoring |
| SCM | system control module |
| SCMO | Software Configuration Management Office |
| SCMP | software configuration management plan |
| SCMP | system contractor management plan |
| SCMU | satellite control and monitor unit |
| SCN | schedule change notice |
| SCN | specification change notice |
| SCNP | specification change notice proposal |
| SCO | spacecraft operator |
| SCO | start checkout |
| SCO | subcarrier oscillator |
| SCO | supercritical oxygen |
| SCO | switch closure out |
| SCOE | special checkout equipment |
| SCOMP | secure communications protocol |
| SCOR | SMS Comsec Operation Room |
| SCOS | subsystem computer operating system |
| SCP | scanner control power |
| SCP | site configuration package |
| SCP | specific candlepower |
| SCR | SAIL change request |
| SCR | schedule change request |
| SCR | signal conditioner |
| SCR | silicon controller rectifier |
| SCR | sneak-circuit report |
| SCR | software change request |
| SCR | space-constructible radiator |
| SCR | strip chart recorder |
| SCRAM | station crew return alternative module |
| SCRB | STSOC Configuration Review Board |
| SCRB | Software Configuration Review Board |
| SCRG | System Change Review Group (MSFC) |
| SCRL | station configuration requirement list |
| SCRP | Secure Communications Requirements Panel |
| SCRPC | Southern California Regional Purchasing Council |
| SCRS | strip chart recording system |
| SCS | secondary coolant system |
| SCS | serialization card system |
| SCS | service and checkout system |
| SCS | signature control system |
| SCS | spacecraft control system |
| SCS | stabilization and control system (subsystem) |
| SCS | system control station |
| SCSAP | SCS adjust panel |
| SCSCP | SCS control panel |
| SCSG | single-channel signal generator |
| SCSMSP | SCS mode select panel |
| SCSS | satellite control simulation system |
| SCT | signal channel transponder |
| SCTE | S-band communication and tracking equipment |
| SCTE | spacecraft central timing equipment |
| SCU | Shuttle configuration unit |
| SCU | secondary control unit |
| SCU | sequence control unit |
| SCU | sequential control unit |
| SCU | service and cooling umbilical |
| SCU | signal conditioner unit |
| SCU | signal control unit |
| SCVE | spacecraft vicinity equipment |
| SCW | search-complete word |
| SD | Space Division |
| SD | signal digitizer |
| SD | solar dynamic |
| SD | spares disposition |
| SD | specification document |
| SD&EOSD | Strategic Defense and Electro-Optics Systems |
| SD&FS | smoke detection and fire suppression |
| SD&I | system development and integration |
| SD/AFSC | Space Division/Air Force Systems Command |
| SD/IN | Space Division/Intelligence |
| SD/SP | Space Division Directorate of Security |
| SD/YO | Space Division director, Operations Support and Integration, deputy commander for Space |
| SDA | shaft drive axis |
| SDA | source data automation |
| SDAF | SRB Retrieval and Disassembly Facility |
| SDAG | Strategic Defense Advisory Group |
| SDAP | Shuttle descent analysis program |
| SDAT | spacecraft data analysis team |
| SDB | shallow-draft barge |
| SDB | shallow-draft board |
| SDB | small disadvantaged business |
| SDBC | software development baseline control |
| SDC | Space Data Corporation |
| SDC | Strategic Defense Center |
| SDC | Strategic Defense Command (U.S. Army) |
| SDC | System Development Corporation |
| SDC | signal data converter |
| SDC | software development computer |
| SDC | spares disposition code |
| SDC-CC | Space Defense Command Communication Center |
| SDC-OC | Space Defense Command Operations Center |
| SDCC | Strategic Defense Command Center |
| SDCP | summary development cost plan |
| SDCS | SAIL data communications system |
| SDD | Shuttle design directive |
| SDD | software description document |
| SDD | software design document |
| SDD | system for distributed data base |
| SDD | systems development device |
| SDDD | software detailed design document |
| SDDL | software design and document language |
| SDE | Space Division evaluator |
| SDE | software development environment |
| SDEF | Service Development Evaluation Facility |
| SDF | Shuttle Development Facility |
| SDF | safing and deservicing facility |
| SDF | simulation data file |
| SDF | single degree of freedom |
| SDF | software development facility |
| SDF | software development file |
| SDF | system development facility (breadboard) |
| SDG | strap-down gyro |
| SDH | Software Development Handbook |
| SDH | System Definition Handbook |
| SDHS | satellite data handling system |
| SDI | Strategic Defense Initiative |
| SDI | selective dissemination of information |
| SDIF | software development and integration facility |
| SDIL | spacecraft DCD interface logic |
| SDIO | Strategic Defense Initiative Office |
| SDIP | Strategic Defense Initiative Program |
| SDL | SAIL difference list |
| SDL | Software Development Laboratory |
| SDL | Software Development Library |
| SDL | scenario description language |
| SDL | standard distribution list |
| SDL | system design language |
| SDLV | Shuttle-derived launch vehicle |
| SDM | Shuttle Definition Manual |
| SDM | Shuttle data management |
| SDM | Subsystem Design Manual |
| SDM | System Definition Manual |
| SDMB | Shuttle Discrepancy Management Board |
| SDMS | Shuttle data management system |
| SDN | safety discrepancy notice |
| SDN | software development note |
| SDNS | secure data network system |
| SDOF | single degree of freedom |
| SDOPS | strategic defense operational planning support |
| SDP | Shuttle data processor |
| SDP | sensor data processing |
| SDP | site data processor |
| SDP | software development plan |
| SDP | standard data processor |
| SDP | strategic defense program |
| SDP | subsystem development plan |
| SDPC | Shuttle Data Processing Complex |
| SDPLV | Shuttle-derived-propellant launch vehicle |
| SDQA | Space Division Quality Assurance |
| SDR | Spacelab disposition record (ESA) |
| SDR | sensor data record |
| SDR | serial data receiver |
| SDR | series dissipating regulator |
| SDR | software design requirement |
| SDR | software design review |
| SDR | storage data register |
| SDR | system design review |
| SDR | systems definitions review |
| SDRB | Software Design Review Board |
| SDRL | subcontract data requirements list |
| SDRL | subcontractor data requirements list |
| SDRS | Shuttle display reconfiguration system |
| SDS | Shuttle dynamic simulation |
| SDS | Shuttle dynamic simulator |
| SDS | Space Defense System |
| SDS | satellite data system |
| SDS | scientific data system |
| SDS | simulation data subsystem |
| SDS | smoke detector system |
| SDS | software design specification |
| SDS | steering and damping subsystem |
| SDS | strategic defense system |
| SDSS | Space Division Shuttle simulator |
| SDT | Shuttle data tape |
| SDT | structural dynamic test |
| SDTA | structural dynamic test article |
| SDTS | satellite data transmission system |
| SDV | Shuttle-derived vehicle |
| SDVF | software development and verification facility |
| SE | support equipment |
| SE | system effectiveness |
| SE | system element |
| SE | system evaluator |
| SE | systems engineering |
| SE&A | system engineering and analysis |
| SE&I | systems engineering and integration |
| SE&TD | system engineering and technical direction |
| SE/FAC | support equipment facility |
| SEA | scanning electrostatic analysis |
| SEA | silicon elastometer ablator |
| SEACF | support equipment assembly and checkout facility |
| SEADS | Shuttle entry air data sensor |
| SEAGA | selective employment of airborne and ground alert |
| SEAID | support equipment abbreviated items description |
| SEAM | system engineering and analysis management |
| SEAPG | Support Equipment Acquisition Planning Group |
| SEASIM | system element attrition simulation |
| SEB | Source Evaluation Board |
| SEB | scientific equipment bay |
| SEB | support equipment building |
| SEB | systems engineering branch |
| SEC | Source Evaluation Committee |
| SEC | sequential events controller |
| SEC | split expander cycle |
| SECO | sustainer engine cutoff |
| SECOR | sequential collation or range |
| SECP | SE computer program |
| SECS | Shuttle events control subsystem |
| SECS | sequential events control system |
| SECS | simulation/experiment control system |
| SED | space engineering document |
| SEDB | SE data base |
| SEDR | SE design review |
| SEDR | Systems Engineering Department report |
| SEE | software engineering exercise |
| SEE | software equality evaluation |
| SEER | sensor experimental evaluation and review |
| SEF | Space Environmental Facility (NASA) |
| SEG | Simulation Engineering Group |
| SEG | system engineering ground rule |
| SEI | SE item |
| SEI | Software Engineering Institute |
| SEI | seller end item |
| SEI | support equipment installation |
| SEICO | support equipment installation and checkout |
| SEID | SE item description |
| SEIS | Shuttle experiments integration support |
| SEIS | Spacelab experiments integration support |
| SEIS | standard end item specification |
| SEIST | system engineering, integration, and support team |
| SEIT | system engineering, integration, and test |
| SEL | Systems Electronics Laboratory |
| SEL | Systems Engineering Laboratories |
| SEM | Shuttle experiment module |
| SEM | scanning electron microscope |
| SEM | seller's engineering memo |
| SEM | space environment monitoring |
| SEM | subcontractor engineering memorandum |
| SEM | system engineering management |
| SEMP | system engineering management plan |
| SEMS | space environment monitor system |
| SEMWS | survivable, endurable missile warning system |
| SEND | shared equipment need date |
| SEO | special engineering order |
| SEOS | synchronous Earth observation satellite |
| SEP | Shuttle electronics package |
| SEP | solar electric propulsion |
| SEP | space electronics package |
| SEP | standard electronic package |
| SEP | support equipment package |
| SEP | systems engineering plan |
| SEPA | site engineering project authorization |
| SEPAP | Shuttle electrical power analysis program |
| SEPAR | Shuttle electrical power analysis report |
| SEPP | system effectiveness program plan |
| SEPS | solar electric propulsion system |
| SER | service employment redevelopment |
| SER | system engineering review |
| SERB | Shuttle Engineering Review Board |
| SERB | Support Equipment Review Board |
| SERB | Systems Engineering Review Board |
| SERD | SE requirements document |
| SERF | SE requirements file |
| SERF | Space Environment Research Facility |
| SERIES-X | satellite emission range infrared Earth sent |
| SERR | SE requirements review |
| SERS | Shuttle enhanced reconfiguration system |
| SERS | Shuttle equipment record system |
| SERT | space electrical rocket test |
| SES | Shuttle engineering simulation |
| SES | Shuttle engineering simulator |
| SES | software evaluation subpanel |
| SES | special-emphasis study |
| SES | spinning-Earth sensor |
| SES | systems engineering simulator |
| SESA | special-equipment stowage assembly |
| SESC | Shuttle events sequential control |
| SESL | Space Environment Simulation Laboratory |
| SESL | Space Environmental Simulation Laboratory |
| SESP | space experiment to support program |
| SET | solar energy thermionic |
| SETA | system engineering and technical assistance |
| SETAC | Systems Engineering Technical Advancement Center |
| SETAC | system engineering and technical assistance contractor |
| SETF | small-engine test facility |
| SETP | system engineering test phase |
| SEU | single-event upset |
| SEUL | support equipment utilization list |
| SEV | status, error, and validity |
| SEVP | status, error, validity, and parity |
| SEVS | simulation and evaluation system |
| SEWB | system engineering work bench |
| SEWG | Sustaining Engineering Working Group |
| SEWG | System Effectiveness Working Group |
| SEWS | satellite early warning system |
| SF | Safety, R&QA, and Protective Services (KSC directorate) |
| SF | safety factor |
| SF | scale factor |
| SF | selection filter |
| SF | signaling frequency |
| SF | spot face |
| SF | star field |
| SF | static firing |
| SF | subcontractor-furnished |
| SF-SOO | KSC Safety Operations Office |
| SFA | sun-finder assembly |
| SFACI | software flight article configuration inspection |
| SFC | selection filter control |
| SFC | specific fuel consumption |
| SFCS | survival flight control system |
| SFDS | system functional design specification |
| SFDT | site format dump tape |
| SFF | static firing facility |
| SFL | secondary Freon loop |
| SFM | senior functional manager |
| SFO | space flight operations |
| SFOF | Space Flight Operations Facility (JPL) |
| SFOM | Shuttle Flight Operations Manual |
| SFOM | space flight operations memorandum |
| SFOP | safety operating procedure (KSC) |
| SFOP | space flight operations plan |
| SFP | single failure point |
| SFP | summary flight plan |
| SFP | sustainer fuel pressure |
| SFPA | single failure point analysis |
| SFPPL | short-form provisioning parts list |
| SFPS | single failure point summary |
| SFS | Shuttle flight status |
| SFSS | satellite field service station |
| SFT | simulated flight test |
| SFT | static firing test |
| SFT | structural fatigue test |
| SFTA | structural fatigue test article |
| SFTF | static firing test facility |
| SFU | standard firing unit |
| SG | scenario generation |
| SG | signal generator |
| SG | surgeon general |
| SGC | stabilized ground cloud |
| SGEMP | space-generated electromagnetic pulse |
| SGEMP | system-generated electromagnetic pulse |
| SGITS | spacecraft/GOSS interface test system |
| SGLS | space-ground link station |
| SGLS | space-ground link system |
| SGML | standard generalized markup language |
| SGMT | simulated Greenwich mean time |
| SGOS | Shuttle ground operations simulator |
| SGP | single ground point |
| SGP | static ground point |
| SGP | structure ground point |
| SGS | symbol generator and storage |
| SGSC | strain gauge signal conditioner |
| SH2 | supercritical hydrogen |
| SHA | sidereal hour angle |
| SHA | system hazard analysis |
| SHAD | stellar horizon atmospheric dispersion |
| SHAD | stellar horizon attitude determination |
| SHAG | simplified high-accuracy guidance (Honeywell) |
| SHAR | stellar horizon atmospheric refraction |
| SHARE | Space Station heat pipe advanced radiator element |
| SHERB | Sandia human error rate bank |
| SHF | superhigh frequency |
| SHIMS | system hazard information management system |
| SHLB | simulation hardware load box |
| SHM | Stage Handling Manual |
| SHOOT | super helium on-orbit transfer |
| SHORAN | short-range navigation |
| SHP | shaft horsepower |
| SHP | sustainer hydraulic pressure |
| SHRD | supplemental heat rejection device |
| SHS | simulation hardware system |
| SHe | supercritical helium |
| SI | Shuttle integration |
| SI | international system of units |
| SI | scientific instrument |
| SI | solar inertial |
| SI | storage immediate |
| SI | system integration |
| SI/FS | system integration and flight software |
| SIA | software impact assessment |
| SIA | solar inertial attitude |
| SIA | structural interface adapter |
| SIA | system integration area |
| SIAP | System Integrity Assurance Program |
| SIAPP | System Integrity Assurance Program Plan |
| SIB | Systems Integration Board |
| SIB | simulation interface buffer |
| SIC | standard industrial classification |
| SICA | structural interface compatibility assessment |
| SICBM | small intercontinental ballistic missile |
| SID | Shuttle integration device |
| SID | simulator interface device |
| SID | standard interface document |
| SID | standard items data base |
| SID | system interface document |
| SIDL | system identification list |
| SIE | SAT integrated experiment |
| SIE | SATKA integrated experiment |
| SIE | Shuttle interface equipment |
| SIE | Society of Industrial Engineers |
| SIE | system integration engineer |
| SIEB | Security Impact Evaluation Board |
| SIES | supervision, inspection, engineering, and services |
| SIF | systems integration facility |
| SIGINT | signals intelligence |
| SIGP | scientific instrument gas purge |
| SIGT1 | Signal Tape 1 |
| SIL | System Integration Laboratory |
| SIL | sound interference level |
| SIL | speech interference level |
| SILTS | Shuttle infrared lee-side temperature sensing |
| SIM | scientific instrumentation module |
| SIMAS | Shuttle information management accountability system |
| SIMCAT | simulate observations using space catalog |
| SIMCHE | simulation and checkout equipment |
| SIMFAC | simulation facility |
| SIMO | single instruction, multiple data paths |
| SIMR | systems integration management review |
| SIMS | Shuttle imaging microwave system |
| SIMS | Shuttle inventory management system |
| SIMS | secondary ion mass spectroscopy |
| SIMS | single inventory management system |
| SIN | support information network |
| SINDA | system improved numerical differences analyzer |
| SINDA | systems improved numerical differences analyzer |
| SINDA | systems improved numerical differencing analysis |
| SINE | spacecraft-induced and natural environment |
| SIO | Systems Integration Office |
| SIO | serial input/output |
| SIO | staged in orbit |
| SIOP | single integrated operational plan |
| SIOP | single integrated operations plan |
| SIOP | strategic integrated operations plan |
| SIP | scientific instrument package |
| SIP | separation instrumentation package |
| SIP | standard interface panel |
| SIP | standard interface plan |
| SIP | strain isolation pad |
| SIP | strategic information plan |
| SIP | system interface processing |
| SIPS | small instrument pointing system |
| SIR | Shuttle imaging radar |
| SIR | systems integration review |
| SIRE | Space Infrared Experiment |
| SIRR | software integration readiness review |
| SIRTF | Shuttle Infrared Telescope Facility |
| SIS | SAIL interface system |
| SIS | Shuttle information service |
| SIS | Shuttle information system |
| SIS | Shuttle integration schedule |
| SIS | Shuttle interface simulator |
| SIS | Spade integrated simulator |
| SIS | Strom inerting system |
| SIS | scanning imaging spectrometer |
| SIS | serial input special |
| SIS | shock isolation system |
| SIS | simulation interface subsystem |
| SIS | simulator interface system |
| SIS | software implementation specification |
| SIS | software integrated schedule |
| SIS | standard interface specification |
| SIS | steam inerting system |
| SIS | systems integration schedule |
| SISD | simulation interface and standards document |
| SISEX | Shuttle Imaging Spectrometer Experiment |
| SIT | Shuttle integrated test |
| SIT | Shuttle interface test |
| SIT | Stevens Institute of Technology |
| SIT | silicon-intensified target |
| SIT | software integrated test |
| SIT | structural integrity test |
| SIT | systems integration test |
| SITE | spacecraft instrumentation test equipment |
| SITP | system integration test plan |
| SITT | systems integration of triad technology |
| SIU | serial interface unit |
| SIU | signal interface unit |
| SIU | standard interface unit |
| SIVE | Spacelab interface verification equipment |
| SJ | slip joint |
| SJC | spacecraft jettison controller |
| SL | Spacelab |
| SL | sea level |
| SL | shelf life |
| SL | sick leave |
| SL | sound level |
| SL | space laboratory |
| SL | space launch |
| SL | star line |
| SL&I | system load and initialization |
| SL-SS | Spacelab subsystem |
| SL-SSS | Spacelab subsystem segment |
| SLA | ERNO Spacelab product assurance department |
| SLA | service-module-to-launch-module adapter |
| SLA | spray-on lightweight ablator |
| SLA | superlight ablative |
| SLA | support and logistics areas |
| SLAC | Stanford Linear Accelerator Center |
| SLAENG | space-based laser engagement |
| SLAHTS | stowage list and hardware tracking system |
| SLAM | side-load arrest mechanism |
| SLAM | simulation language for alternative modeling |
| SLAM | station logistics and maintainability (data base) |
| SLAMAP | space laser mission analysis program |
| SLAR | side-looking airborne radar |
| SLAT | supersonic low-altitude target |
| SLATM | supersonic low-altitude target missile |
| SLBD | sea light-beam director |
| SLBM | submarine-launched ballistic missile |
| SLC | ERNO Spacelab project control |
| SLC | space launch complex |
| SLC6 | Space Launch Complex 6 |
| SLCA | ERNO Spacelab contract administration |
| SLCL | shop/lab configuration layout |
| SLCM | ERNO Spacelab configuration management |
| SLCM | sea-launched cruise missile |
| SLCS | software library control system |
| SLCSAT | submarine laser communications satellite |
| SLD | stiff-leg derrick |
| SLE | ERNO Spacelab engineering |
| SLED | space laser experiment definition |
| SLEMU | Spacelab engineering model unit |
| SLF | Shuttle Landing Facility (KSC) |
| SLFC | selectable low-frequency clock |
| SLFCS | survivable low-frequency communications system |
| SLI | ERNO Spacelab integration and test |
| SLIM | scanned long-wave infrared module |
| SLKT | survivability, lethality, and key technologies |
| SLL | shelf-life limit |
| SLM | sound-level meter |
| SLM | space laboratory module |
| SLO | ERNO Spacelab operations |
| SLO | Spacelab only |
| SLOC | source lines of code |
| SLODB | Spacelab Operational Data Book |
| SLOS | star line of sight |
| SLP | ERNO Spacelab payload |
| SLPB | Spacelab Program Board |
| SLPCRB | SIP low-profile cable routing bracket |
| SLPEM | Sparta Linear Programming Effectiveness Model |
| SLPO | ERNO Spacelab Program Office |
| SLR | scanning laser radar |
| SLS | Spacelab simulator |
| SLS | secondary landing site |
| SLS | sortie lab simulator |
| SLS | statement-level simulator |
| SLSA | Shuttle logistics support aircraft |
| SLSG | suit loop stimuli generator |
| SLSMS | Spacelab support module simulator |
| SLT | ERNO Spacelab technology |
| SLUK | Spacelab utility kit |
| SLV | space launch vehicle |
| SLVX | new launch vehicle derivative of Titan 34D |
| SLW | straight-line wavelength |
| SM | Shuttle Management (KSC) |
| SM | service module |
| SM | short module |
| SM | stabilized member |
| SM | stable member |
| SM | strategic missile |
| SM | subcontract management |
| SM | successful mission |
| SM | support module |
| SM | system monitoring |
| SM | systems management |
| SM&S | systems management and sequencing |
| SM/PM | systems management/performance monitor |
| SM3/H | standard m3 per hour |
| SMA | Systems Management American Corporation |
| SMA | simulation model adapter |
| SMAB | Solid Motor Assembly Building |
| SMAG | star magnitude |
| SMARTS | simulation, monitoring, analysis, reduction, and test |
| SMATH | satellite materials and target hardening |
| SMB | space meteorology branch |
| SMC | Scientific Manpower Commission |
| SMCC | Shuttle Mission Control Center |
| SMCH | standard mixed-cargo harness |
| SMCM | small module core memory |
| SMCS | separation monitoring control unit |
| SMD | Spacelab mission development |
| SMD | Structures and Mechanics Division |
| SMD | shop manufacturing development |
| SMD | special measuring device |
| SMD | system measuring device |
| SMDC | shielded mild detonating cord |
| SMDM | small multiplexer/demultiplexer |
| SMEAR | SPAN/mission evaluation action request |
| SMED | single minute exchange of dies |
| SMEK | summary message enable keyboard |
| SMES | Shuttle mission engineering simulator |
| SMES | Shuttle mission evaluation simulation |
| SMES | superconducting magnetic energy storage |
| SMG | Space Flight Meteorology Group |
| SMI | SM initialization |
| SMI | sortie mission integrator |
| SMIA | single multiplexer interface assembly |
| SMIC | sortie mission integration contractor |
| SMIRR | Shuttle multispectral infrared radiometer |
| SMIS | STDN management information system |
| SML | structure mold line |
| SMM | Solar Maximum Mission |
| SMM | Subcontract Management Manual |
| SMM | Subsystem Management Manual |
| SMM | subsystem measurement management |
| SMMD | specimen mass measurement device |
| SMMR | scanning multichannel microwave radiometer |
| SMOC | simulation mission operation computer |
| SMP | software management plan |
| SMPM | Structural Materials Property Manual |
| SMPS | service module propulsion stage |
| SMPTRB | Shuttle Main Propulsion Test Requirement Board |
| SMQ | SM quad |
| SMQ | structure module qualification |
| SMR | source, maintenance, and recoverability |
| SMRD | spin motor rotation detector |
| SMRD | spin motor run detector |
| SMRD | spin motor run direction |
| SMRD | spin motor run discrete |
| SMRD | spin motor running detector |
| SMRD | spin motor running director |
| SMS | Shuttle mission simulator |
| SMS | Solar Maximum satellite |
| SMS | separation mechanism subsystem |
| SMS | sequenced milestone system |
| SMS | site-managed software |
| SMS | software modification sheet |
| SMS | space motion sickness |
| SMS | stationary manipulator system |
| SMS | synchronous meteorological satellite |
| SMS | system mechanical schematic |
| SMSA | standard metropolitan statistical area |
| SMSA | strategic missile support area |
| SMSB | strategic missile support base |
| SMSC | software moding, sequencing, and control |
| SMSCC | Shuttle mission simulator computer complex |
| SMSFB | SMS fixed base |
| SMSG | Shuttle Maintenance Steering Group |
| SMSS | survivable missile surveillance system |
| SMT | selective message transaction |
| SMT | small missile telecamera |
| SMT | surface-mounted technology |
| SMTAS | Shuttle modal test and analysis system |
| SMTF | Shuttle Mission Trainer Facility |
| SMU | soft mockup |
| SMU | software management utility |
| SMU | source management utility |
| SMU | speaker/microphone unit |
| SMVP | Shuttle Master Verification Plan |
| SMVRD | Shuttle master verification requirements document |
| SMW | standard materials work sheet |
| SMW | strategic missile wing |
| SN | serial number |
| SN | service note |
| SN | space network |
| SNA | system network architecture |
| SNAP | Shipboard Nontactical ADP Program II |
| SNAP | space nuclear auxiliary power |
| SNAP-10 | space nuclear auxiliary power system |
| SND | signal network distributor |
| SNF | system noise figure |
| SNPO | Space Nuclear Propulsion Office (NASA) |
| SNR | signal-to-noise ratio |
| SNS | Shuttle network system |
| SNSO | Space Nuclear Systems Office |
| SO | Shuttle operations |
| SO | Support Operations (KSC directorate) |
| SO | shop order |
| SO | slow operating (relay) |
| SO/SI | space operations and scientific investigation |
| SO2 | solid oxygen |
| SO2 | supercritical oxygen |
| SOA | state of the art |
| SOAR | Shuttle orbital applications and requirements |
| SOARS | Shuttle operation automated reporting system |
| SOATS | support operation automated training system |
| SOC | Shuttle Operations Center |
| SOC | Space Operations Center |
| SOC | simulation operation computer |
| SOC | system operational concept |
| SOC | system option controller |
| SOCAR | Shuttle Operational Capability Assessment Report |
| SOCC | Satellite Operations Control Center |
| SOCC | Shuttle Operations Computing Center |
| SOCCB | Secure Operations Configuration Control Board |
| SOCH | Spacelab orbiter common hardware |
| SOCKO | systems operational checkout |
| SOCS | subsystem operation and checkout system |
| SODB | Shuttle Operational Data Book |
| SODB | start of data block |
| SODIM | Standard Operational Data Item Manual |
| SODS | Shuttle operational data submittal |
| SODS | Shuttle operational data system |
| SODS | Skylab orbit-deorbit system |
| SODSIM | strategic offense-defense simulation |
| SOF | safety of flight |
| SOFAR | sound fixing and ranging |
| SOFAS | survivable optical forward acquisition system |
| SOFI | spray-on foam insulation |
| SOFT | space operations and flight technique |
| SOFT | suborbit flight test |
| SOGS | science operations ground system |
| SOH | start of heading |
| SOH | state of health |
| SOI | space object identification |
| SOIS | Spacelab/orbiter interface simulator |
| SOM | Stage Operating Manual |
| SOM | Standard Operating Manual |
| SOM | ship operations manager (NASA) |
| SOM | spares optimization model |
| SOM | suborbital mission |
| SOMF | start of minor frame |
| SOMM | Software Operations and Maintenance Manual |
| SOMS | Shuttle orbiter medical system |
| SON | statement of need |
| SOP | Spacelab opportunity payload |
| SOP | secondary oxygen pack |
| SOP | secure operations preboard |
| SOP | spacecraft operations plan |
| SOP | standard operating procedure |
| SOP | structural optimization procedure |
| SOP | subsystem operating program |
| SOP | subsystems operating procedure |
| SOP | systems operating plan |
| SOPC | Shuttle Operations and Planning Center |
| SOQ | system optical quality |
| SOR | specific operational requirement |
| SOR | specification operational requirement |
| SOR | stable orbit rendezvous |
| SOS | serial output special |
| SOS | silicon on sapphire |
| SOS | source of supply |
| SOS | space ordnance system |
| SOS | stabilized optical sight |
| SOS | synchronous-orbit satellite |
| SOS | system operational safety |
| SOSI | space operations scientific investigation |
| SOSMAN | Space Operations System Manifesting Program |
| SOSRM | strap-on solid rocket motor |
| SOT | solar optical telescope |
| SOT | strap-on tank |
| SOTS | suborbital tank separation |
| SOV | shutoff valve |
| SOV | solenoid-operated valve |
| SOW | start of word |
| SOW | statement of work |
| SOW | subdivision of work |
| SP | Shuttle Project Office (KSC) |
| SP | safety plan |
| SP | shoulder pitch |
| SP | signal processor |
| SP | single pole |
| SP | solar physics |
| SP | solid propellant |
| SP | sortie payload |
| SP | stable platform |
| SP | standard or peculiar |
| SP | static pressure |
| SP | surveillance payload |
| SP-ACT | Site Activation Office (KSC Shuttle) |
| SP-AF | Air Force STS Liaison Office (KSC Shuttle) |
| SP-FGS | Flight and Ground Systems Office (KSC Shuttle) |
| SP-ILS | Integrated Logistics Support Office (KSC Shuttle) |
| SP-OPI | Operations Planning and Integration Office (KSC Shuttle) |
| SP-OSO | Off-Site Offices (KSC Shuttle) |
| SP-PCO | Program Control Office |
| SP-SMO | Site Management Office (KSC Shuttle) |
| SPA | S-band power amplifier |
| SPA | servopower amplifier |
| SPA | servopower assembly |
| SPA | shared peripheral area |
| SPA | signal processor assembly |
| SPA | small-payload accommodations |
| SPA | software product assurance |
| SPA | space processing application |
| SPA | steering position amplifier |
| SPACE | spacecraft prelaunch automatic checkout equipment |
| SPAD | Shuttle payload accommodation document |
| SPADATS | space defense acquisition and tracking system |
| SPADCCS | space defense command and control system |
| SPADE | Space Acquisition Defense Experiment |
| SPADOC | Space Defense Operations Center |
| SPADS | Shuttle problem analysis data system |
| SPAF | simulation processor and formatter |
| SPAH | Spacelab Payload Accommodations Handbook |
| SPAN | spacecraft analysis |
| SPAR | Shuttle pointed autonomous research |
| SPAR | supportability problem assessment report |
| SPARS | space precision attitude reference system |
| SPART | space research and technology |
| SPAS | Indonesian communication satellite |
| SPAS | Shuttle pallet applications system |
| SPAS | Shuttle pallet satellite |
| SPAT | Satellite Performance Analysis Team |
| SPAT | small-payload accommodation terminal |
| SPC | Shuttle Processing Contract (contractor) |
| SPC | Software Productivity Consortium |
| SPC | shipping and packing cost |
| SPC | starting-point code |
| SPC | statistical process control |
| SPC | stored program command |
| SPC | stored program control |
| SPC | synoptic properties code |
| SPCA | secondary power control assembly |
| SPCC | STS Processing Control Center |
| SPCR | software problem change request |
| SPCS | service and performance checkout system |
| SPCU | simulation process control unit |
| SPD | standard practice directive |
| SPD | system preliminary design |
| SPDB | subsystem power distribution box |
| SPDM | special-purpose dexterous manipulator |
| SPDR | scheduled planning drawing release |
| SPDR | software preliminary design review |
| SPDS | stabilized payload deployment system |
| SPDT | single pole, double throw |
| SPE | software process engineering |
| SPE | static phase error |
| SPEARS | supplier performance evaluation and rating system |
| SPEC | specialist function |
| SPEE | special-purpose end effector |
| SPF | Software Production Facility (JSC) |
| SPF | Spacelab Processing Facility |
| SPFA | single-point failure analysis |
| SPFL | single-point failure list |
| SPFM | single-point failure mode |
| SPFP | single-point failure potential |
| SPG | single-point ground |
| SPGAI | surface position gimbal angle indicator |
| SPI | surface position indicator |
| SPICE | Shuttle payload integration cargo evaluation |
| SPICE | Spacelab payload integration and coordination in Europe |
| SPICE | Survey Probe Infrared Celestial Experiment |
| SPICE | survey program of infrared celestial experiments |
| SPIDF | support-planning identification file |
| SPIDPO | Shuttle Payload Integration and Development Program Office (JSC) |
| SPIDPO | Shuttle Payload Integration and Development Program Office (JSC) |
| SPIDS | stabilized payload interface deployment system |
| SPIF | Shuttle Payload Integration Facility |
| SPIF | Shuttle Processing Interface Facility |
| SPIF | standard payload interface |
| SPII | Shuttle program implementation instruction |
| SPIMS | Shuttle program information management system |
| SPIRE | Spectral Infrared Rocket Experiment |
| SPIRE | sensor performance in a radiation environment |
| SPIRIT | spatial infrared telescope |
| SPL | scratch pad line |
| SPL | secondary payload |
| SPL | serialized parts list |
| SPL | sonic pressure level |
| SPL | sound pressure level |
| SPL | system programming language |
| SPM | Software Programmer's Manual |
| SPM | Standard Parts Manual |
| SPM | seeker and processor math models |
| SPM | software performance monitor |
| SPM | subsystem project manager |
| SPMS | special-purpose manipulator system |
| SPN | Shuttle project notice (KSC) |
| SPO | Shuttle Program Office |
| SPO | Spacecraft Program Office |
| SPO | Special Projects Office |
| SPO | System Program Office |
| SPO | System Project Office |
| SPO | spare parts order |
| SPOC | Shuttle Payload Operations Contract |
| SPOC | Shuttle portable on-board computer |
| SPOM | STS planning and operations management |
| SPORTS | simplified payload/orbiter thermal simulator |
| SPOT | Space Station proximity operations trainer |
| SPP | SPIF processing procedure |
| SPP | Simulation Planning Panel |
| SPP | security practice and procedures |
| SPP | signal preprocessor |
| SPP | solar physics payload |
| SPPIL | Shuttle preferred pyrotechnic items list |
| SPPL | spare parts provisioning list |
| SPPM | system performance prediction model |
| SPR | software problem report |
| SPR | subcontractor performance review |
| SPRAG | STS Payload Requirements and Analysis Group |
| SPRD | system performance requirements document |
| SPRU | standard power regulator unit |
| SPS | Shuttle procedures simulator |
| SPS | Shuttle processing site |
| SPS | satellite power system |
| SPS | secondary propulsion system |
| SPS | service propulsion system (subsystem) |
| SPS | software product specification |
| SPS | software productivity solution |
| SPS | statement of prior submission |
| SPSL | space parts selection list |
| SPSS | science planning and scheduling system |
| SPST | single pole, single throw |
| SPT | steering position transducer |
| SPTD | supplemental provisioning technical documentation |
| SPTI | structural program test input |
| SPUR | separate parts usage record |
| SPVPF | Shuttle Payload Vertical Processing Facility |
| SPWG | Spare Parts Working Group |
| SQA | software quality assurance |
| SQA | subcontractor quality assurance |
| SQC | statistical quality control |
| SQE | software quality evaluation |
| SQE | supplier quality evaluation |
| SQEP | software quality evaluation plan |
| SQH | supplier quality history |
| SQIDS | satellite quick-look interactive display system |
| SQL | Standard Query Language |
| SQPSK | sequential phase shift keying |
| SQW | square wave |
| SR | safety review |
| SR | saturable reactor |
| SR | scan ratio |
| SR | shift register |
| SR | shop release |
| SR | standard repair |
| SR | statement of requirements |
| SR | status register |
| SR | status report |
| SR | status review |
| SR | sunrise |
| SR | support request |
| SR | support room |
| SR&PA | safety, reliability, and product assurance |
| SR&Q | safety, reliability, and quality |
| SR&QA | safety, reliability, and quality assurance |
| SRA | spin reference angle |
| SRA | spin reference axis |
| SRA | support requirements analysis |
| SRA | system requirements analysis |
| SRAD | Shuttle radar assembly demonstration |
| SRAD | space radiator assembly demonstration |
| SRAG | Space Radiation Analysis Group |
| SRAM | short-range attack missile |
| SRAM | static random access memory |
| SRAT | short-range advanced technology |
| SRB | Safety Review Board |
| SRB | Software Review Board |
| SRB | solid rocket booster |
| SRB | system requirements baseline |
| SRBAB | SRB Assembly Building |
| SRBARF | SRB Assembly and Refurbishment Facility |
| SRBDF | SRB Disassembly Facility |
| SRC | sample return canister |
| SRCB | Simulation Requirements Control Board |
| SRCB | Software Requirements Change Board |
| SRCBD | Software Requirements Change Board directive |
| SRD | Shuttle requirements definition |
| SRD | Shuttle requirements document |
| SRD | Spacecraft Research Division |
| SRD | systems requirements document |
| SRDCS | simulation reconfiguration data collection system |
| SRDH | System Requirements Definition Handbook |
| SRE | SASCB responsible engineer |
| SRE | STDN ranging equipment |
| SREM | software requirements methodology |
| SREM | system requirement engineering methodology |
| SRF | Shuttle Refurbishment Facility |
| SRH | Subsystem Requirements Handbook |
| SRH | System Requirements Handbook |
| SRHIT | small radar homing interceptor technology |
| SRHIT | small radar-hardening interceptor technology |
| SRI | Southwest Research Institute |
| SRIP | security requirements implementation plan |
| SRJE | SNA remote job entry |
| SRL | Space Radar Laboratory |
| SRL | single-rack laboratory |
| SRM | Specification Requirements Manual |
| SRM | solid rocket motor |
| SRM | spares requirement model |
| SRM | standard reference material |
| SRM&QA | safety, reliability, maintainability, and quality |
| SRMC | stimulus-response measurements catalog |
| SRMS | Shuttle remote manipulator system |
| SRN | software release notice |
| SRO | superintendent of range operations |
| SRO | supervisor of range operations |
| SRP | seat reference plane |
| SRP | seat reference point |
| SRP | stabilizer reference plane |
| SRP | standard repair procedure |
| SRPA | spherical retarding potential analyzer |
| SRPS | secure record and playback subsystem |
| SRR | Shuttle requirements review |
| SRR | site readiness review |
| SRR | software requirements review |
| SRR | specification readiness review |
| SRR | subcontractor readiness review |
| SRR | system requirements review |
| SRRID | site readiness review item document |
| SRS | short register to storage |
| SRS | simulated remote station |
| SRS | simulation reconfiguration system |
| SRS | simulation recording system |
| SRS | software requirements specification |
| SRS | specification review sheet |
| SRS | specification revision sheet |
| SRS | stellar radiation sensor |
| SRS | support requirements system |
| SRSCC | simulated remote station control console |
| SRSI | simulated reusable surface insulation |
| SRSR | schedule and resources status report |
| SRSS | Shuttle range safety system |
| SRT | Shuttle requirements traceability |
| SRT | safety review team |
| SRT | special rated thrust |
| SRT | specification requirements table |
| SRT | station readiness test |
| SRT | supporting research and technology |
| SRT | system readiness test |
| SRT | system requirements test |
| SRU | shop repairable unit |
| SRU | shop replaceable unit |
| SRU | space replaceable unit |
| SRW | standard reaction wheel |
| SS | Shuttle system |
| SS | Space Shuttle |
| SS | Space Station |
| SS | second structure |
| SS | segment specification |
| SS | set screw |
| SS | short scarf (thruster nozzle) |
| SS | single side band |
| SS | single signal |
| SS | single string |
| SS | space segment |
| SS | space sphere |
| SS | stainless steel |
| SS | station set |
| SS | structures subsystem |
| SS | subsystem |
| SS | sun sensor |
| SS | support subsystem |
| SS | system software |
| SS | system specification |
| SS | system summary |
| SS&A | space systems and applications |
| SSA | S-band single access |
| SSA | Shuttle simulation aircraft |
| SSA | Software Support Agency |
| SSA | software safety analysis |
| SSA | space suit assembly |
| SSA | system support analysis |
| SSAD | software system analysis document |
| SSAD | system summary acceptance document |
| SSAIAF | Space Systems Automated Integration and Assembly Facility |
| SSAS | STS/SSPE attachment system |
| SSAT | Space Shuttle access tower |
| SSAT | system segment acceptance test |
| SSB | Source Selection Board |
| SSB | single side band |
| SSBC | summary sheet bar chart |
| SSBN | fleet ballistic missile submarine |
| SSBUV | Shuttle solar backscatter ultraviolet |
| SSBW | spread-spectrum bandwidth |
| SSC | Shuttle system contractor |
| SSC | Stennis Space Center (formerly National Space Technology Laboratories) |
| SSC | sensor signal conditioner |
| SSC | solid-solution cermet |
| SSC | solid-state circuit |
| SSC | subsystem computer |
| SSC | system sequence controller |
| SSCA | surface sampler control assembly |
| SSCB | Space Station Control Board |
| SSCC | Space Station Control Center |
| SSCC | Support Services Control Center |
| SSCF | Space Station Control Facility |
| SSCHS | Space Shuttle cargo handling system |
| SSCL | Shuttle system commonality list |
| SSCM | Space Station cost model |
| SSCP | small self-contained payload |
| SSCR | support software change request |
| SSCSP | Space Shuttle Crew Safety Panel |
| SSD | Space Systems Division (Rockwell) |
| SSD | Space Systems Division (USAF) |
| SSD | Spacecraft Software Division (NASA) |
| SSD | system summary display |
| SSDAC | Space Station data acquisition and control |
| SSDB | spin system distribution box |
| SSDD | software system design document |
| SSDF | Space Science Development Facility |
| SSDH | Subsystem Data Handbook |
| SSDO | steady-state design and optimization code |
| SSDS | Space Station data system |
| SSDSAS | Space Station Data System Architecture Study |
| SSE | Space Shuttle engine |
| SSE | software support environment |
| SSE | software support equipment |
| SSE | sortie support equipment |
| SSE | space support equipment |
| SSE | spacecraft simulation equipment |
| SSE | subsystem element |
| SSE | system (subsystem) support equipment |
| SSE | system safety engineering |
| SSE | system security engineering |
| SSEDF | Software Support Environment Development Facility |
| SSEM | system security engineering manager |
| SSEOS | Space Shuttle engineering and operations support |
| SSEOS | Space Station external operations simulator |
| SSEP | system security engineering phase |
| SSEP | system security engineering plan |
| SSES | software system environment system |
| SSEUWG | SSE Users' Working Group |
| SSF | SRB storage facility |
| SSF | Space Station Freedom |
| SSFCS | Space Shuttle flight control system |
| SSFGSS | Space Shuttle Flight and Ground System Specification |
| SSFL | Santa Susana Field Laboratory |
| SSFN | Space Station flight network |
| SSFP | Space Station Freedom Program |
| SSFS | Space Shuttle functional simulation |
| SSG | Sensor Systems Group |
| SSGDAC | Space Station guidance, dynamics, and control |
| SSH | simulation support hardware |
| SSHA | Shuttle system hazard analysis |
| SSHA | subsystem hazard analysis |
| SSHB | Station Set Handbook |
| SSI | San Salvador Island |
| SSI | sector scan indicator |
| SSI | significant structural item |
| SSI | space segment integration |
| SSIBD | Shuttle system interface block diagram |
| SSIE | Smithsonian Science Information Exchange |
| SSIP | Shuttle Student Involvement Project |
| SSIP | system software interface processing |
| SSIS | Space Station information system |
| SSITP | Shuttle system integrated test plan |
| SSL | site support list |
| SSL | system software loader |
| SSL | system specification language |
| SSLV | standard small launch vehicle |
| SSM | satellite survivability model |
| SSM | second surface mirror |
| SSM | site status message |
| SSM | spacecraft system monitor |
| SSM | subsystem manager |
| SSM | subsystem model |
| SSM | support system module |
| SSM | systems support module |
| SSMB | Space Shuttle maintenance baseline |
| SSMC | Space Shuttle Mission Control |
| SSME | Space Shuttle main engine |
| SSMEC | Space Shuttle main engine controller |
| SSMECA | SSME controller assembly |
| SSMTF | Space Station Man-Systems Training Facility |
| SSMTF | Space Station Mockup and Trainer Facility |
| SSN | Social Security number |
| SSO | Space Shuttle orbiter |
| SSO | Systems Software Office |
| SSO | safety signification operation |
| SSO | source selection official |
| SSO | subsystem operation (in Spacelab) |
| SSO | system security officer |
| SSODB | Space Station Operational Data Book |
| SSODC | steady-state off-design code |
| SSOP | space systems operating procedure |
| SSP | Space Shuttle Program |
| SSP | Space Station Program |
| SSP | security system plan |
| SSP | small sortie payload |
| SSP | spread spectrum |
| SSP | standard switch panel |
| SSP | subsolar point |
| SSP | system security plan |
| SSPC | Spacelab stored program command |
| SSPD | Shuttle system payload data |
| SSPD | Shuttle system payload definition |
| SSPD | Shuttle system payload description |
| SSPDA | Space Shuttle payload data activity |
| SSPDB | subsystem power distribution box |
| SSPDS | Space Shuttle Payload Data Study |
| SSPE | Space Station Program element |
| SSPF | Sortie Software Production Facility |
| SSPF | Space Shuttle Programming Facility |
| SSPF | Space Station Processing Facility |
| SSPFA | Space Shuttle Program flight assignment |
| SSPGSE | Space Shuttle Program ground support equipment |
| SSPII | Space Shuttle Program implementing instruction |
| SSPM | Software Standards and Procedures Manual |
| SSPM | Space Shuttle program manager |
| SSPM | Standards and Procedures Manual |
| SSPM | System Safety program manager |
| SSPM | solid-state photomultiplier |
| SSPO | Space Shuttle Program Office |
| SSPO | Space Station Projects Office |
| SSPP | Space Station Program participant |
| SSPP | system safety program plan |
| SSPPM | SPADOC system performance prediction model |
| SSPPSG | Space Shuttle Payload Planning Steering Group |
| SSPRO | Space Shuttle Program Resident Office |
| SSPS | Space Shuttle Program schedule |
| SSPS | solar satellite power station |
| SSPTF | Santa Susana Propulsion Test Facility |
| SSR | shop support request |
| SSR | software specification review |
| SSR | staff support room |
| SSR | station set requirement |
| SSR | system safety review |
| SSR | system status review |
| SSRD | station set requirements document |
| SSRImp | Space Station resource impact model |
| SSRMS | Space Station remote manipulator system |
| SSRN | system software reference number |
| SSROP | Space Station Resource Optimization Program |
| SSRP | System Safety Review Panel |
| SSRR | station set requirements review |
| SSRT | STS Security Review Team |
| SSS | Space Shuttle segment (NASA) |
| SSS | scanning star simulator |
| SSS | sensor support system |
| SSS | simulation study series |
| SSS | sortie support system |
| SSS | spacecraft software system |
| SSS | spinning sun sensor |
| SSS | stage separation subsystem |
| SSS | station set specification |
| SSS | subsystem segment |
| SSS | system and segment specification |
| SSS | system security standard |
| SSS | system segment specification |
| SSSC | Space Station Support Center |
| SSSS | Space Shuttle System Specification |
| SSSSR | Space Shuttle system safety review |
| SSST | Space Station system trainer |
| SST | Shuttle system test |
| SST | seamless steel tubing |
| SST | simulated structural test |
| SST | simulation and systems test |
| SST | single system trainer |
| SST | space surveillance and tracking |
| SST | spacecraft systems test |
| SST | structural static test |
| SST | subsystem terminal (on Spacelab) |
| SST | subsystem test |
| SST | supersonic transport |
| SSTC | Space Shuttle test conductor |
| SSTCLS | Space Shuttle test, checkout, and launch support |
| SSTF | Space Station Training Facility |
| SSTO | single stage to orbit |
| SSTOM | SAIL system and test operations manager |
| SSTS | satellite surveillance and tracking system |
| SSTS | space surveillance and tracking system |
| SSTS | space-based surveillance and tracking system |
| SSUS | spinning solid upper stage |
| SSUS-A | SSUS for Atlas-Centaur-class spacecraft |
| SSUS-D | SSUS for Delta-class spacecraft |
| SSUSP | spinning solid upper stage project |
| SSV | Space Shuttle vehicle |
| SSV | space sortie vehicle |
| SSVS | subsystem verification specification |
| SSWG | Shuttle Security Working Group |
| SSWP | Space Station work package |
| ST | Spacelab technology |
| ST | self-test |
| ST | sequential timer |
| ST | serial traceability |
| ST | shock tunnel |
| ST | simplification task |
| ST | single throw |
| ST | space telescope |
| ST | special tooling |
| ST | star tracker |
| ST | system test |
| ST&E | security test and evaluation |
| STA | Shuttle training aircraft |
| STA | static test article |
| STA | structural test article |
| STACC | standard telemetry and communications component |
| STADAC | station data acquisition and control |
| STADAN | satellite tracking and data acquisition network |
| STADAN | space tracking and data acquisition network |
| STADU | system termination and display unit |
| STAG | Shuttle Turnaround Analysis Group |
| STAG | secure text and graphics |
| STAMP | system testability and maintainability program |
| STAPPMAN | Station Payload Propulsion Manifesting Program |
| STAR | Shuttle Turnaround Analysis Report |
| STAR | scientific and technical report |
| STAR | significant technological achievement in research |
| STAR | significant technology achievement through research |
| STAR | software tools and requirements |
| STAR | source transmission and response |
| STAR | space taxi and recovery |
| STAR | space transportation automated reconfiguration |
| STARE | staring technology advanced research and evaluation |
| STARR | Schedule, Technical, and Resources Report |
| STARS | software technology for adaptable and reliable systems |
| STARS | software technology for adaptable, reliable software |
| STARS | space transportation automated reconfiguration system |
| STARS | status analysis and reporting system |
| START | Strategic Arms Reduction Talks |
| START | selection to activate random testing |
| STAS | Space Transportation Architecture Study |
| STAT | system testability and analysis tool |
| STATS | star tracker alignment test set |
| STBE | space transportation booster engine |
| STC | Satellite Test Center |
| STC | Satellite Tracking Center |
| STC | Shuttle test conductor |
| STC | Space Technology Center |
| STC | sensitivity time control |
| STC | short-time constant |
| STC | spacecraft test conductor |
| STC | standard test configuration |
| STC | systems test complex |
| STCC | STS Transportation Coordination Center |
| STCP | short-term cost plan |
| STCS | special telemetry conversion system |
| STD | Shuttle test detector |
| STD | Spacecraft Technology Division |
| STD | sensor and test driver |
| STD | software test description |
| STD | special test device |
| STD | standard test device |
| STDL | standard distribution list |
| STDN | space flight tracking and data network |
| STDN | spacecraft tracking and data network |
| STE | special test equipment |
| STE | system test engineer |
| STEP | Surveillance and Tracking Experiment Program |
| STEP | space test experiments platform |
| STF | S-band temperature (Fahrenheit) |
| STF | satellite test facility |
| STF | spin test facility |
| STF | standard task file |
| STG | Shuttle Test Group |
| STG | Space Task Group |
| STI | Stanford Telecommunications, Incorporated |
| STI | screw thread insert |
| STIC | Space Test Integration Contract (contractor) |
| STIL | Software Test and Integration Laboratory |
| STINFO | scientific and technical information |
| STIRD | SAIL test implementation requirements document |
| STIVE | standard interface verification equipment |
| STL | Space Technology Laboratories |
| STL | System Test Laboratory |
| STLDD | software top-level design document |
| STLOS | star line of sight |
| STM | SMS test matrix |
| STM | signal termination module |
| STM | static test model |
| STM | structural test model |
| STM | system termination module |
| STM | systems test missile |
| STME | space transportation main engine |
| STMU | special test and maintenance unit |
| STN | software trouble note |
| STO | Solar Terrestrial Observatory |
| STO | subtask officer |
| STOL | short takeoff and landing |
| STOP | SCOMP-trusted operating program |
| STP | Shuttle Technology Panel |
| STP | satellite test program |
| STP | self-test program |
| STP | software technology program |
| STP | software test plan |
| STP | software test procedure |
| STP | space technology payload |
| STP | space test program |
| STP | standard temperature and pressure |
| STP | static test program |
| STP | subsystem test plan |
| STP | system test plan |
| STP | systems technology program |
| STPH | static phase error |
| STR | software test report |
| STR | system test review |
| STRADEM | strategic defense effectiveness model |
| STS | Shuttle test station |
| STS | Space Transportation System |
| STS | structural transition section |
| STS | system test station |
| STSAM | Space Transportation System analysis model |
| STSOC | Space Transportation System Operations Contract |
| STSOPO | Space Transportation System Operations Program Office |
| STSR | system test summary report |
| STSYM | Space Transportation System model |
| STU | secure telephone unit |
| STU | special test unit |
| STU | static test unit |
| STU | systems test unit |
| STV | structural test vehicle |
| STVS | secure television system |
| SU | support unit |
| SUBCON | subsystem console |
| SUI | state unemployment insurance |
| SUL | software utilization list |
| SUM | Software User's Manual |
| SUMC | space ultrareliable modular computer |
| SUMS | Shuttle upper atmosphere mass spectrometer |
| SUPSALV | supervisor of salvage (U.S. Navy) |
| SURE | Shuttle users' review and evaluation |
| SURRVS | standard umbilical retraction retention vent system |
| SURS | standard umbilical retraction system |
| SURS | standard umbilical retraction/retention system |
| SURTEX | Shuttle-released target experiment |
| SURTEX | Shuttle-released technology experiment |
| SURVIAC | Survivability/Vulnerability Information Analysis |
| SUSIM | solar ultraviolet spectral irradiance monitor |
| SUZ | Santa Susana |
| SV | Shuttle vehicle |
| SV | safety valve |
| SV | side view |
| SV | solenoid valve |
| SV | space vehicle |
| SV | state vector |
| SVA&C | Shuttle vehicle assembly and checkout |
| SVAB | Shuttle Vehicle Assembly Building |
| SVAC | Shuttle vehicle assembly and checkout |
| SVAFB | South Vandenberg Air Force Base |
| SVB | Shuttle vehicle booster |
| SVB | space vehicle booster |
| SVC | spacecraft vehicle contractor |
| SVC | supervisor call |
| SVCDS | space vehicle computer design system |
| SVCDS | space vehicle control/display simulation |
| SVCMU | space vehicle control and monitor unit |
| SVDS | space vehicle dynamic simulator |
| SVDS | space vehicle dynamics simulation |
| SVDT | Space Vehicle Development Team |
| SVE | space vehicle equipment |
| SVIU | space vehicle interface unit |
| SVO | Sunnyvale Operations |
| SVO | space vehicle operations |
| SVOD | space vehicle operations director |
| SVP | software verification procedure |
| SVR | space vehicle requirement |
| SVRR | software verification readiness review |
| SVS | Shuttle vehicle simulator |
| SVS | space vehicle system |
| SVS | suit ventilation system |
| SVT | space vehicle test |
| SVTN | secure voice telecommunications network |
| SVTN | secure voice teleconference network |
| SW | seawater |
| SW | shortwave |
| SW | software |
| SW | solar wing |
| SW | spot weld |
| SW | status word |
| SW | switchboard wound |
| SWA | support work authorization |
| SWAD | subaccount work authorization document |
| SWAD | subdivision of work authorization document |
| SWAT | stress wave analysis technique |
| SWATEC | short-wavelength thermoelectrically cooled |
| SWB | Solder Waiver Board |
| SWCC | Southwestern Computing Center |
| SWCDR | software critical design review |
| SWCI | software configuration inspection |
| SWD&I | software development and integration |
| SWEE | software engineering environment |
| SWG | Schedule Working Group |
| SWG | Science Working Group |
| SWG | Security Working Group |
| SWG | Software Working Group |
| SWIFET | short-wave infrared field effect transistor |
| SWIFET | switched field effect transistor |
| SWIR | short-wavelength infrared |
| SWOB | salaries, wages, overhead, and benefits |
| SWP | safe working pressure |
| SWPA | Shuttle wing panel analysis |
| SWPDR | software preliminary design review |
| SWR | standing wave ratio |
| SWRR | software readiness review |
| SWS | software system |
| SWS | switch scan |
| SWT | supersonic wind tunnel |
| SWWG | Software Working Group |
| SY | shoulder yaw |
| SYSREM | system requirements engineering methodology |
| SYSTRAN | systems analysis translator |
| Si:X | extrinsic silicon |
| Si:Xx | arsenic-doped silicon detector (low-noise approach) |
| Si:Yy | gallium-doped silicon detector (high-risk approach) |
| SiC/Al | silicon carbide/aluminum |
| SiCp | particulate silicon carbide |
| SiCw | whisker-filled silicon carbide |
| Syncom | synchronous communication satellite |
| s/s | samples per second |
| s/s | symbols per second |
| scc | standard cubic centimeter |
| scch | standard cubic centimeters per hour |
| sccm | standard cubic centimeters per minute |
| sccs | standard cubic centimeters per second |
| scf | standard cubic feet |
| scfh | standard cubic feet per hour |
| scfm | standard cubic feet per minute |
| scfs | standard cubic feet per second |
| scim | standard cubic inches per minute |
| scis | standard cubic inches per second |
| sm | statute mile |
| sps | samples per second |
| sr | steradian |