| PET | Petrol. Elementary Tools (computer Program) | - | Computer Acronyms(common) |
| PET | Photoinduced Electron Transfer | - | Computer Acronyms(common) |
| PET | Poly(ethylene Terephthalate) | - | Computer Acronyms(common) |
| PET | Positron Emission Tomography | - | Computer Acronyms(common) |
| PET | Potential Evapotranspiration | - | Computer Acronyms(common) |
| PET | Positron Emission Tomography | - | Medical(slang) |
| PET | Phase Elapsed Time | - | Organizations |
| PET | Personal Electronic Transactor - Pierre Elliott Trudeau - Positron Emission Tomography (as In PET Scan) - PolyEthylene Terephthalate (plastic) -Preliminary English Test | - | Astronomy |
