| Abbreviation | Definition |
|---|---|
| PIT | Personal Improvement Tools |
| PIT | Personal Infrared Transmitter |
| PIV | Post Indicator Valve |
| PIX | Private Internet eXchange |
| PIYAN | Plus If You Act Now |
| PJP | Partial Joint Penetration |
| PJQ | Prismatic Jaws, Quick-grip Vise |
| PK | Product Knowledge |
| PKGG. | Packaging |
| PKM | Parallel Kinematic Machine |
| PKP | Purple K Powder (Dry Chemical Fire Extinguishing Agent) |
| PKS | Proposed Korean Standard |
| PKV | Parkerizing Kit Video |
| PL | Power Line |
| PL/I | Programming Language/One |
| PLBG | Pitch Line Bevel Gear |
| PLBGC | Pitch Line Bevel Gear Chuck |
| PLC | Personalized, Localized, and Customized |
| PLC | Printed Laminated Cover |
| PLC | Product Life Cycle |