| Abbreviation | Definition |
|---|---|
| PP | Push-Pull |
| P-P | Peak-to-Peak (Value) |
| PPAS | Photometric Periods Of Artificial Satellites |
| PPB | Parts Per Billion |
| PPB | Parts per Billion (p/b preferred) |
| PPB | Program Performance Baseline |
| PPC | Phased Provisioning Code |
| PPC | Preprocessing Center |
| PPCO2 | Partial Pressure Carbon Dioxide |
| PPCO2 | Partial Pressure CO2 |
| PPEP | Plasma Physics and Environmental Perturbation |
| PPF | Payload Processing Facility |
| PPF | Payload Processing Facility (USAF) |
| PPH | Pounds per Hour |
| PPI | Pulse Position Indicator |
| PPIL | Priced Provisioned Item List |
| PPL | Planning Parts List |
| PPL | Priced Parts List |
| PPM | Part per Minute |
| PPM | Parts Per Million |