| Abkürzung | Bereich | Staat | Bedeutung |
| DKRZ | Institut | D | Deutsches Klimarechenzentrum |
| DL | Computer | Download | |
| DLC | Computer | Data Link Control | |
| DLE | Computer | Data Link Escape | |
| DLM | Software | Dynamic Link Module | |
| DLR | Institut | D | Deutsche Forschungsanstalt für Luft- und Raumfahrt e.V. |
| DM | Währung | D | Deutsche Mark |
| Computer | D | Data Mode | |
| Disconnected Mode | |||
| dm | Einheit | Dezimeter | |
| DMA | Computer | Direct Memory Access | |
| DMAC | Computer | DMA Controller | |
| DMAC | Technik | Digital Multimeter | |
| DMY | Software | Day Month Year | |
| DN | Computer | Down | |
| DNS | Computer | Domain Name Service | |
| DO | Computer | Data Out | |
| DOL | Software | Direct Object Linking | |
| DOS | Software | Disk Operating System (Betriebssystem) | |
| DOSEM | Software | DOS Emulation | |
| DP | Software | Data Processing | |
| DPAREN | Computer | Data Parity Enable | |
| DPB | Computer | Drive Parameter Block | |
| DPI | Computer | Dots per Inch | |
| DPMI | Software | DOS Protected Mode Interface | |
| DPMI | Computer | Display Power Management Signalling | |
| DPT | Computer | Drive Parameter Table | |
| DR | Computer | Data Received | |
| Firma | USA | Digital Research | |
| DRAM | Computer | Dynamic Random Access Memory | |
| DRI | Firma | USA | Digital Research Incorporated |
| DRV | Computer | Drive | |
| DS | Computer | Data Send | |
| Data Server | |||
| Double Sided | |||
| Software | Data Segment | ||
| DSA | Computer | Data Service Adapter | |
| DSDD | Computer | Double Sided and Double Density | |
| DSHD | Computer | Double Sided and High Density | |
| DSOM | Computer | Distributed System Object Model | |
| DSP | Computer | Digital Signal Processor | |
| DSQD | Computer | Double Sided and Quad Density | |
| DSR | Computer | Data Set Ready | |
| Device Status Register | |||
| DTD | Software | Document Type Definition | |
| DTD | Computer | D | Datentransfereinrichtung |
| DTP | Software | Desktop Publishing | |
| DTR | Computer | Data Transfer Rate | |
| Du. | Haus | D | Dusche |
| DV | Computer | D | Datenverarbeitung |
| DVA | Computer | D | Datenverarbeitungsanlage |
| DVI | Computer | Digital Video Interactive | |
| DWG | Software | Drawing | |
| DX | Software | Directory Exchange | |
| DXC | Software | Data Exchange Control | |
| DXJ | Technik | Datex J (Bildschirmtext) |