| Abbreviation | Definition |
|---|---|
| DCSA | Distinguished Chapter Service Award |
| DCSI | Data and Control Signal Interface |
| DCSSI | Development Commissioner for Small Scale Industries |
| DCSU | Digital Computer Switching Unit |
| DCT | Deep Cryogenic Treatment |
| DCT | Development Consulting And Training |
| DCT | Diversified Career Technology |
| DCT | Death Certificate Transcription |
| DCT | Discrete Cosine Transformation |
| DCU | Digital Computer Unit |
| DCU | Display and Control Unit |
| DCU | Departmental Commercial Undertakings |
| DCV | Direct Current Volts |
| DCWASA | District of Columbia Water and Sewer Authority |
| DCX | Delta Clipper EXperimental |
| DCYL | Dauphin County Young Lawyers |
| DD | Doordarshan |
| DD | Demand Draft |
| DD | Deputy Director |
| DD | Doctor of Divinity |
| DD | Double Degree |
| DD | Diffractive Dissociation |
| DD | Duplicate Disk |
| DD | Dry Dressing |
| DD | Disco Dancer |
| DD | Direct Debit |
| DD | Demand Deposit |
| DD / STO | Direct Debit/STanding Order |
| DD&A | "Depreciation, Depletion, and Amortization" |
| DDA | Data Delivery Acknowledgement |
| DDA | Digital Differential Analyzer |
| DDA | ICD Departure Authorization |
| DDA | Disability Discrimination Act |
| DDA | Downtown Development Authority |
| DDA | Dedicated Digital Access |
| DDA | Demand Deposit Account |
| DDAS | Digital Data Acquisition System |
| DDAT | Dyslexia, Dyspraxia, and Attention Therapy |
| DDAT | Dorsal Digital Artery of Thumb |
| DDAVP | Desmopressin test for urine osmolality |
| DDB | Double Declining Balance |
| DDC | Duplication, Degeneration, and Complementation |
| DDC | Data Distribution Center |
| DDC | Defense Documentation Center |
| DDC | Drunk Driving Conviction |
| DDC | Data Differentiator Code |
| DDCMP | Developmental Disabilities Case Management Project |
| DDCU | DC-to-DC Converter Unit |
| DDD | Degenerative Disc Disease |
| DDD | Defined Daily Dose |