| Abbreviation | Definition |
|---|---|
| DIA | DIAmeter |
| DIAG | DIAGonal |
| DIAGN | DIAGNose |
| DIC | Do It Cheap |
| DIF | DIFference |
| DIF | Discrete Increment Filter |
| DIFF | DIFFerential |
| DIGI | DIGItal |
| DIH | Discrete Input High |
| DIL | Deliverable Items List |
| DIL | Discrete Input Low |
| DIM | Design Interface Meeting |
| DIME | Dropping In a Microgravity Environment |
| DIMEN | DIMENsion |
| DIMES | Decent Image Motion Estimation System |
| DIP | Designated Inspection Point |
| DIP | Display Input Processor |
| DIP | Display Interface Processor |
| DIPEC | Defense Industrial Plant Equipment Center |
| DIPL | Display Initial Program Load |