| Abbreviation | Definition |
|---|---|
| PCIN | Program Change Identification Number |
| PCIN | Program Change Incorporation Notice |
| PCIN | Program Change Integration |
| PCL | Pallet Coolant Loop |
| PCL | Power Control List |
| PCL | Primary Coolant Line |
| PCL | Primary Coolant Loop |
| PCL | Programming Check List |
| PCM | Power Control Mission |
| PCM | Pressurized Cargo Module |
| PCMD | Pulse-Code Modulation, Digital |
| PCME | Pulse-Code Modulation Event |
| PCMM | Portable Coordinate Measurement Machine |
| PCMMU | Pulse-Code Modulation Master Unit |
| PCMS | Pulse-Code Modulation Shared |
| PCN | Page Change Notice |
| PCN | Program Change Notice |
| PCN | Program Control Number |
| PCO | Photo Catalytic Oxidation |
| PCO | Post-Checkout Operations |