| Abbreviation | Definition |
|---|---|
| psid | Pounds Per Square Inch Differential |
| PSIEC | Punjab Small Industries and Export Corporation |
| PSIG | Propulsion Systems Integration Group |
| psig | Pounds Per Square Inch Gauge |
| psis | Pounds Per Square Inch Sealed |
| PSK | Product Service Key |
| PSK | Phase Shift Keying |
| PSK | Phase Shift Keyed |
| PSL | Propellant Seal |
| PSL | Pressure Seal |
| PSL | Perpendicular to the Sun Line |
| PSLV | Polar Satellite Launch Vehicle |
| PSM | Professional Staff Member |
| PSM | Production Stage Manager |
| PSM | Priority Select Module |
| PSM | Project Security Manager |
| PSM | Pyro Substitute Monitor |
| PSM | Propellant Storage Module |
| PSM | Phase Sensitive Modulator |
| PSM | Process Safety Management |
| PSMP | Public Sector Management Program |
| PSMPC | Public Service and Merit Protection Commission |
| PSMS | Punjab State Medical Services |
| PSMS | Partula Species Management System |
| PSN | Purge Sequence Number |
| PSO | Punch System Operator |
| PSOP | Payload Systems Operating Procedures |
| PSP | Praja Socialist Party |
| PSP | Program Segment Pointer |
| PSP | Professional Standards Program |
| PSP | Personal Solicitation Program |
| PSP | Project Schedule Plan |
| PSP | Program Support Plan |
| PSP | Payload Support Plan |
| PSP | Payload Specialist Panel |
| PSP | Payload Signal Processor |
| PSPA | Pressure Static Probe Assembly |
| PSPC | Permanent South Pacific Commission |
| PSPDN | Packet Switched Public Data Network |
| PSPL | Priced Spare Parts List |
| PSR | Pulsating Source Of Radiation |
| PSR | Program Status Review |
| PSR | Pre-Shipment Review |
| PSRD | Program Support Requirements Document |
| PSS | Product Support Services |
| PSS | Professional Selling Skills |
| PSS | Portable Spacecraft Simulator |
| PSS | Propulsion Support System |
| PSS | Propellant Supply Subsystem |
| PSS | Payload Support System |