Digital Signature Standard 
Defense Security Service 
Decision Support System 
Decision Support Systems 
Department of Social Services 
Digital Switched Service 
Distribution Standard System 
Deep Space Station 
Deep Space Stations 
Digital Satellite System 
Digital Small Switch 
Digital Switched Services 
Department of Social Security 
Direct Station Selection 
DASIS 
Description Schemes 
Digital Sun Sensor 
Digitized Sky Survey 
Diplomatic Security Service 
Direct Station Selector 
Direct Support System 
Directorate of Support Services 
Documentation Support Services 
Data Standards Subcommittee 
Data Station Selector 
data storage set 
Data Support Section 
Data Systems Services 
Data Systems Staff 
Data Systems Supervisor