System Requirements Document 
Software Requirements Document 
Secret Restricted Data 
Software Requirements Data 
Systems Requirements Document 
System Requirement Document 
self-reading dosimeter 
Step Recovery Diode 
Science Requirements Document 
Short Range Devices 
Shuttle Requirements Definition 
Shuttle Requirements Document 
Software Requirements Description 
Standard Reference Data 
Standard Reporting Designator 
Secondary Received Data 
Serial Record Division 
Shipper-receiver difference 
Site Requirements Document 
Solvency Ratio Directive 
Standard Route Document 
Super-Radiant Diode 
Systems Requirement Document 
Safety and Reliability Directorate 
sarcin/ricin domain 
Sardinian 
Screen Reader System 
Search and Rescue 22 
Secondary Receive Data 
secret restrictive data