| Abbreviation | Definition |
|---|---|
| INBIT | Input Bit |
| INC | INComplete |
| INC | INCrease |
| INC | Installation Notice Card |
| INC | Installation Notice Certificate |
| INCL | INCLination |
| INCL | INCLude |
| INCLN | Incline |
| INCO | Inconel (nickel, chromium, and iron) |
| INCO | Instrumentation and Communication Officer |
| INCR | Increase |
| INCR | Increment |
| INCS | Integrated Network Control System |
| IND | Indicator |
| IND | Industrial |
| INDAT | Incoming Data |
| INES | Iue Newly Extracted Spectra |
| INF | Infinite |
| INFT | Informal Training |
| ING | Inertial Navigation Gyroscope |