105 SDF definitions

Service Data Function 
Software Development File 
Simplified Directional Facility 
Software Development Facility 
Standard Data Format 
single degree of freedom 
Safing and Deservicing Facility 
Seasonal Derating Factor 
self defense force 
Standard Delay File 
Standard Delay Format 
System Development Facility 
System Dialog Facility 
Science Data Formatter 
Screen Definition Facility 
Service Definition Function 
Simplified Direction Finding 
So Dang Funny 
Software Development Files 
Software Development Folder 
Space Delimited File 
Space Delimited Format 
Specialized Database Functions 
Spin Density Functional 
Standard Distance File 
Statistical Demand Forecasting 
stromal-derived factor 
Structured Display File 
Student Data Form 
Sub-Distribution Frame