| Abbreviation | Definition |
|---|---|
| CWS | Coalition for Working Systems |
| CWYS | Confirm What You See |
| CX | Control X |
| CY | Control Y |
| CYA | Cover Your Applications |
| D | Digit |
| D | Disaster |
| D/A | Digital-to-Analog |
| D4Q | Digital For Quality |
| DA | Data Analysis |
| DA | Desk Accessory |
| DAAG | Deputy Assistant Adjutant General |
| DAAG | Deputy Assistant Attorneys General |
| DAAS | Data As A Service |
| DABR | Data Address Breakpoint Register |
| DAC | Digital Analog Converter |
| DAC | Dual Attachment Concentrator |
| DACS | Danbury Area Computer Society |
| DAFS | Document Attribute File Specification |
| DAGA | Democratic Attorney General Association |