Social Security Administration 
Software Support Activity 
Source Selection Authority 
Supply Support Activity 
Southern Study Area 
Signal Security Agency 
Serial Storage Architecture 
Space Situational Awareness 
Space Suit Assembly 
Supervisory Special Agent 
System Safety Assessment 
Sun Sensor Assembly 
Surface Supplied Air 
Shuttle Simulation Aircraft 
Social Security Administration's 
Solid State Amplifier 
Space Situation Awareness 
specific surface area 
Standard Spending Assessment 
strapdown sensor assembly 
Support Structure Assembly 
Auxiliary/Cargo Submarine 
SATCOM Signal Analyzer 
Seismological Society of America 
Selective Service Act 
Semiconductor Safety Association 
Single State Agency 
Single System Analysis 
Soaring Society of America 
social security act