Special Drawing Right 
Software Defined Radio 
System Design Review 
Sensor Data Record 
Special Drawing Rights 
signal-to-distortion ratio 
Software Design Review 
Streaming Data Request 
Systems Design Review 
SCHROEDER 
Sensor Data Records 
Service Difficulty Reports 
Shared Data Research 
Significant deficiency report 
Single-Drift Region 
software design requirements 
Space Division Regulation 
Spacelab Disposition Record 
Systems Definition Review 
Session Detail Record 
Singapore Depository Receipt 
Single Data Rate 
Single Design Review 
Size Dimension Ratio 
Small Development Requirement 
Small Development Requirements 
SNAP Developmental Reactor 
Software Defined Radios 
software discrepancy report 
Special Depository Receipt