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 MODIS:     Moderate Resolution Imaging Spectroradiometer 
 MOL:       Manned Orbiting Laboratory 
 MOLA:      Mars Observer Laser Altimeter (on Mars Observer) 
 MOMV:      Manned Orbital Maneuvering Vehicle 
 MOTV:      Manned Orbital Transfer Vehicle 
 MPC:       Minor Planets Circular 
 MPEC:      Minor Planets Electronic Circular 
 MPL:       Mars Polar Lander 
 MRSR:      Mars Rover and Sample Return 
 MRSRM:     Mars Rover and Sample Return Mission 
 MSFC:      (George C.) Marshall Space Flight Center (NASA) 
 MTC:       Man Tended Capability 
 NACA:      National Advisory Committee on Aeronautics (became NASA) 
 NASA:      National Aeronautics and Space Administration 
 NASDA:     NAtional Space Development Agency (Japan) 
 NASM:      National Air and Space Museum 
 NASP:      National AeroSpace Plane 
 NBS:       National Bureau of Standards (now NIST) 
 NDV:       NASP Derived Vehicle 
 NEAR:      Near Earth Asteroid Rendezvous (now named NEAR Shoemaker) 
 NERVA:     Nuclear Engine for Rocket Vehicle Application 
 NG:        NewsGroup 
 NGC:       New General Catalog 
 NGST:      Next Generation Space Telescope 
 NICMOS:    Near Infrared Camera / Multi Object Spectrometer (HST upgrade) 
 NIMS:      Near-Infrared Mapping Spectrometer (on Galileo) 
 NIR:       Near InfraRed 
 NIST:      National Institute of Standards and Technology (was NBS) 
 NLDP:      National Launch Development Program 
 NOAA:      National Oceanic and Atmospheric Administration 
 NOAO:      National Optical Astronomy Observatories 
 NORAD:     NORth American aerospace Defense 
 NRAO:      National Radio Astronomy Observatory 
 NRO:       National Reconnaissance Office 
 NS:        Neutron Star 
 NSA:       National Security Agency 
 NSF:       National Science Foundation 
 NSO:       National Solar Observatory 
 NSSDC:     National Space Science Data Center 
 NTR:       Nuclear Thermal Rocket(ry) 
 NTT:       New Technology Telescope 
 OAO:       Orbiting Astronomical Observatory 
 OCST:      Office of Commercial Space Transportation 
 OMB:       Office of Management and Budget 
 OMS:       Orbital Maneuvering System 
 OPF:       Orbiter Processing Facility 
 ORFEUS:    Orbiting and Retrievable Far and Extreme Ultraviolet Spectrometer 
 OSC:       Orbital Sciences Corporation 
 OSCAR:     Orbiting Satellite Carrying Amateur Radio 
 OSSA:      Office of Space Science and Applications 
 OSSE:      Oriented Scintillation Spectrometer Experiment (on CGRO) 
 OT:        Off-Topic 
 OTA:       Optical Telescope Assembly (on HST) 
 OTHB:      Over The Horizon Backscatter 
 OTV:       Orbital Transfer Vehicle 
 OV:        Orbital Vehicle 
 PAM:       Payload Assist Module 
 PAM-D:     Payload Assist Module, Delta-class 
 PDS:       Planetary Data System 
 PI:        Principal Investigator 
 PLSS:      Portable Life Support System 
 PM:        Pressurized Module 
 PMC:       Permanently Manned Capability 
 PMIRR:     Pressure Modulated InfraRed Radiometer (on Mars Observer) 
 PMT:       PhotoMultiplier Tube 
 PPM:       Positions and Proper Motions (catalog) 
 PSF:       Point Spread Function 
 PSR:       PulSaR 
 PV:        Photovoltaic 
 PVO:       Pioneer Venus Orbiter 
 QSO:       Quasi-Stellar Object 
 RADAR:     RAdio Detection And Ranging 
 RAS:       Royal Astronomical Society 
 RASC:      Royal Astronomical Society of Canada 
 RCI:       Rodent Cage Interface (for SLS mission) 
 RCS:       Radar Cross Section 
 RCS:       Reaction Control System 
 REM:       Rat Enclosure Module (for SLS mission) 
 RF:        Radio Frequency 
 RFI:       Radio Frequency Interference 
 RFNA:      Red Fuming Nitric Acid 
 RIACS:     Research Institute for Advanced Computer Science 
 RMS:       Remote Manipulator System 
 RNGC:      Revised New General Catalog 
 ROTFL:     Rolling On The Floor Laughing 
 ROSAT:     ROentgen SATellite 
 ROUS:      Rodents Of Unusual Size (I don't believe they exist) 
 RSA:       Russian Space Agency 
 RSN:       Radio SuperNova 
 RSN:       Real Soon Now 
 RTG:       Radioisotope Thermoelectric Generator 
 RTLS:      Return To Launch Site (Shuttle abort plan) 
 SAA:       South Atlantic Anomaly 
 SAGA:      Solar Array Gain Augmentation (for HST) 
 SAMPEX:    Solar Anomalous and Magnetospheric Particle EXplorer 
 SAO:       Smithsonian Astrophysical Observatory 
 SAR:       Search And Rescue 
 SAR:       Synthetic Aperture Radar 
 SARA:      Satellite pour Astronomie Radio Amateur 
 SAREX:     Search and Rescue Exercise 
 SAREX:     Space Amateur Radio Experiment 
 SAS:       Space Activity Suit 
 SAS:       Space Adaptation Syndrome 
 SAT:       Synthetic Aperture Telescope 
 S/C:       SpaceCraft 
 SCA:       Shuttle Carrier Aircraft 
 SCT:       Schmidt-Cassegrain Telescope 
 SDI:       Strategic Defense Initiative 
 SDIO:      Strategic Defense Initiative Organization (now BMDO) 
 SEDS:      Students for the Exploration and Development of Space 
 SEI:       Space Exploration Initiative 
 SEST:      Swedish ESO Submillimeter Telescope 
 SETI:      Search for ExtraTerrestrial Intelligence 
 SID:       Sudden Ionospheric Disturbance 
 SIR:       Shuttle Imaging Radar 
 SIRTF:     Space (formerly Shuttle) InfraRed Telescope Facility 
 SL:        (Comet) Shoemaker-Levy 
 SL:        SpaceLab 
 SLAR:      Side-Looking Airborne Radar 
 SLC:       Space Launch Complex 
 SLS:       Space(lab) Life Sciences 
 SMC:       Small Magellanic Cloud 
 SME:       Solar Mesosphere Explorer 
 SMEX:      SMall EXplorers 
 SMM:       Solar Maximum Mission 
 SN:        SuperNova (e.g., SN1987A) 
 SNR:       Signal to Noise Ratio 
 SNR:       SuperNova Remnant 
 SNU:       Solar Neutrino Units 
 SOFIA:     Stratospheric Observatory For Infrared Astronomy 
 SOHO:      SOlar Heliospheric Observatory 
 SPAN:      Space Physics and Analysis Network 
 SPDM:      Special Purpose Dextrous Manipulator 
 SPOT:      Satellite Pour l'Observation de la Terre 
 SPS:       Solar Power Satellite 
 SR:        Special Relativity 
 SRB:       Solid Rocket Booster 
 SRM:       Solid Rocket Motor 
 SSF:       Space Station Fred (er, Freedom) (Superseded by ISS) 
 SSI:       Solid-State Imager (on Galileo) 
 SSI:       Space Studies Institut 
 SSME:      Space Shuttle Main Engine 
 SSPF:      Space Station Processing Facility 
 SSPS:      Sky Survey Prototype System 
 SSRMS:     Space Station Remote Manipulator System 
 SSRT:      Single Stage Rocket Technology 
 SST:       Spectroscopic Survey Telescope 
 SST:       SuperSonic Transport 
 SSTO:      Single Stage To Orbit 
 STIS:      Space Telescope Imaging Spectrometer (to replace FOC and GHRS) 
 STS:       Shuttle Transport System (or) Space Transportation System 
 STScI:     Space Telescope Science Institute 
 STSDAS:    Space Telescope Science Data Analysis System 
 SWAS:      Submillimeter Wave Astronomy Satellite 
 SWF:       ShortWave Fading 
 TAL:       Transatlantic Abort Landing (Shuttle abort plan) 
 TANSTAAFL: There Ain't No Such Thing As A Free Lunch 
 TAU:       Thousand Astronomical Unit (mission) 
 TCS:       Thermal Control System 
 TDRS:      Tracking and Data Relay Satellite 
 TDRSS:     Tracking and Data Relay Satellite System 
 TEA:       Torque Equilibrium Attitude 
 TES:       Thermal Emission Spectrometer (on Mars Observer) 
 THEMIS:    THermal EMission Imaging System (on Mars 2001 Odyssey) 
 TIROS:     Television InfraRed Observation Satellite 
 TLA:       Three Letter Acronym 
 TOMS:      Total Ozone Mapping Spectrometer 
 TOPS:      Toward Other Planetary Systems 
 TPS:       Thermal Protection System 
 TSS:       Targeted Search System 
 TSS:       Tethered Satellite System 
 TSTO:      Two Stage To Orbit (also 2STO) 
 UARS:      Upper Atmosphere Research Satellite 
  
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 --- SoupGate-Win32 v1.05 
  * Origin: you cannot sedate... all the things you hate (1:229/2)