| Abbreviation | Definition |
|---|---|
| CSV | Comma Separated Values |
| CT | Carry Through |
| CTAG | Calvary Temple Assembly Of God |
| CTD | Change Tape Density |
| CTDMR | Change Tape Density, Mid Record |
| CU | Call Unix |
| CUFA | College and University Faculty Assembly |
| CUFA | College University Faculty Assembly |
| CVF | Create Verbose File |
| CW | Change Word |
| CW | Content Word |
| CWD | Convert Word to Doubleword |
| CWDE | Convert Word to Extended Double |
| CWI | Copy With Include |
| CZI | Count Zero Interrupt |
| CZZC | Convert Zone to Zip Code |
| D | Delete |
| DA | Delete Attribute |
| DAA | Decimal Adjust Accumulator |
| DAA | Decimal Adjust After |