| Abbreviation | Definition |
|---|---|
| MD | Meta Directory |
| MD | Move Directory |
| MD | Multiplication Division |
| MDA | Modifiable Data Area |
| MDA | Monochrome Display Adapter |
| MDA | Monochrome Display Adaptor |
| MDA | Multi Dimensional Archive |
| MDB | Media Data Bank |
| MDB | Microsoft DataBase |
| MDC | Message Digest Code |
| MDC | MUMPS Development Committee |
| MDD | Meaning Definition Document |
| MDF | Master Data File |
| MDF | Master Dictionary File |
| MDI | Manual Data Input |
| MDI | Multi Document Interface |
| MDI | Multilevel Document Interface |
| MDK | Mix Development Kit |
| MDK | Module Development Kit |
| MDL | Master Directory Listing |