Signaling Transfer Point 
Signalling Transfer Point 
Signal Transfer Point 
Space Test Program 
Software Test Plan 
Spanning Tree Protocol 
Signal Transfer Points 
Shielded Twisted Pair 
Signaling Transfer Points 
standard temperature and pressure 
Surface Transportation Program 
South Texas Project 
Space Test Payload 
System Test Plan 
Soldier Training Publication 
Soldier Training Publications 
Short Term Plan 
Selective Tape Print 
Software through Pictures 
Solar Terrestrial Probes 
Straight Through Processing 
System Test Procedure 
Security Test Plan 
Self Test Pass 
Sewage Treatment Plant 
Shuttle Technology Panel 
Situation Target, Proposal 
Solar-Terrestrial Physics 
Solar-Terrestrial Probes 
Space Technology Payload