| Abkürzung | Bereich | Staat | Bedeutung |
| D | Staat | Bundesrepublik Deutschland | |
| Physik | Durchmesser | ||
| d | Physik | Durchmesser | |
| D/A | Technik | Digital to Analog | |
| DAC | Technik | Digital to Analog Converter | |
| DAP | Software | Data Access Protocol | |
| DARI | Software | Database Application Remote Interface | |
| DASD | Computer | Direct Access Storage Device | |
| DAT | Technik | Digital Audio Tape | |
| Computer | Disk Array Technology | ||
| DATACOM | Technik | Data Communications | |
| DATEL | Technik | Data Telecommunication | |
| DATEX | Technik | Data Exchange | |
| DB | Software | Data Base | |
| DBCS | Software | Double-Byte Character Set | |
| DBS | Computer | Data Base Server | |
| DC | Software | Device Control | |
| Display Context | |||
| DCB | Software | Data Control Block | |
| DCC | Technik | Digital Compact Cassette | |
| Software | Data Country Code | ||
| DCF | Software | Document Composition Facility | |
| DCL | Software | Declaration | |
| Device Clear | |||
| DCS | Computer | Data Control System | |
| Diagnostic Communication System | |||
| DD | Computer | Double Density | |
| Digital Display | |||
| DDB | Software | Device Dependent Bitmap | |
| DDCMP | Technik | Digital Data Communications Message Protocol | |
| DDE | Software | Dynamic Data Exchange | |
| Direct Data Entry | |||
| DDEML | Software | Dynamic Data Exchange Manager Library | |
| DDK | Software | Device Driver Kit | |
| DDX | Software | Dialog Data Exchange | |
| de | Staat | Bundesrepublik Deutschland | |
| DEA | Gericht | USA | Drug Enforcement Administration |
| DEBI | Computer | Direct Memory Access Extended Bus Interface | |
| DEC | Firma | USA | Digital Equipment Corporation |
| Mathematik | Decrement | ||
| Software | Device Clear | ||
| DEE | Computer | D | Datenendeinrichtung |
| DEL | Software | Delete (Löschen) | |
| DELSTR | Software | Delete String (Zeichenkette löschen) | |
| DF | Software | Data Field | |
| Device Flag | |||
| DFÜ | Computer | D | Datenfernübertragung |
| DFUE; | Computer | D | Datenfernübertragung |
| DFV; | Computer | D | Datenfernverarbeitung |
| DG | Haus | D | Dachgeschoß |
| DHH | Haus | D | Doppelhaushälfte |
| DI | Technik | Decoder Identification | |
| Data In | |||
| DIA | Computer | Document Interchange Architecture | |
| DIB | Software | Device Independent Bitmap | |
| DIIP | Computer | Direct Interrupt Identification Port | |
| DIN | Institut | D | Deutsches Institut für Normen |
| Normung | |||
| DIO | Technik | Data Input Output | |
| DIR | Software | Directory | |
| DIO | Software | Displacement | |
| DIV | Mathematik | Divide |