| Abbreviation | Definition |
|---|---|
| MCRD | Master Cross Reference Data |
| MCS | Minimal Common Supertype |
| MD | Meta Data |
| MD | Mutable Dictionary |
| MDAC | Microsoft Data Access Controls |
| MDB | Mesh Data Binary |
| MDB | Microsoft Access Database (file extension) |
| MDB | Mongo Data Base |
| MDBD | Modelação e Desenvolvimento de Banco de Dados |
| MDC | Mapped Diagnostic Context |
| MDC | Multitenant Database Containers |
| MDD | Multi-Dimensional Data |
| MDDD | Marine Drug Discovery Database |
| MDDS | Multi Dimensional Data Sign |
| MDE | Manual Data Entry |
| MDF | Main Data File |
| MDF | Main Database File |
| MDF | Marker Definition File |
| MDF | Master Database File |
| MDF | Media Descriptor File |