Defense Travel System 
Defense Transportation System 
Data Transfer System 
Dedicated Transmission Service 
Data Terminal Set 
Delirium tremens 
Distributed Time Service 
Data Transmission System 
Diplomatic Telecommunications Service 
Decode Time Stamp 
Data Transformation Services 
Digital Termination System 
Digital Theater System 
Daily Transaction Statements 
Data Transfer Service 
Data Transformation Service 
Decoding Time Stamp 
diametral tensile strength 
DIGITAL TANDEM SWITCH 
Digital Telemetry System 
Digital Television Standard 
Digital Termination Service 
Digital Terrain System 
Digital Test Subsystem 
Digital Theatre Sound 
Digital Theatre System 
Diplomatic Telecommunications System 
Direct Transmission System 
Direct Trunk Select 
Directory Toll System