| Abbreviation | Definition |
|---|---|
| PCS | Provincial Civil Service |
| PCS | Portable Character Set |
| PCS | Predefined Command Sequence |
| PCS | Procedure Completion Sheet |
| PCS | Primary Coolant System |
| PCS | Pressure Control System |
| PCS | Power Conversion System |
| PCS | Portable Computer System |
| PCS | Pointing Control System |
| PCS | Payload Control Supervisor |
| PCS | Payload Checkout System |
| PCS | Personal Communications Services |
| PCSR | Parallel Channels Signaling Rate |
| PCT | Patient Care Technician |
| PCT | Participating Countries Treaty |
| PCT | Photometric Calibration Test |
| PCTC | Payload Crew Training Complex |
| PCTE | Portable Commercial Test Equipment |
| PCTO | Payload Cost Tradeoff Optimization |
| PCTR | Pad Connection Terminal Room |
| PCU | Process Control Unit |
| PCU | Pressure Control Unit |
| PCU | Power Control Unit |
| PCU | Payload Checkout Unit |
| PCV | Purge Control Valve |
| PCV | Precheck Verification |
| PCV | Packed Cell Volume |
| PCV | Prescribed Concentration or Value |
| PCVB | Pyro Continuity Verification Box |
| PCVL | Pilot Controlled Visual Landing |
| PCW | Previously Complied With |
| PCZ | Physical Control Zone |
| pd | paid |
| PD | Pen Down |
| PD | Phase Dual |
| PD | Progressive Disease |
| PD | Program Director |
| PD | Private Detective |
| PD | Professional Development |
| PD | Prison Deliverer |
| PD | Propellant Dispersal |
| PD | Project Directive |
| PD | Program Directive |
| PD | Procurement Drawing |
| PD | Procurement Document |
| PD | Preliminary Design |
| PD | Peritoneal Dialysis |
| PD&RS | Payload Deployment and Retrieval Subsystem |
| PDA | Preventive Detention Act |
| PDA | Personal Digital Assistant |