| Paxos | Paxi |
| Pay per click | Pay per click |
| Payerne | Payerne |
| Paykan | Paykan |
| Pays-de-la-Loire | Pays de la Loire |
| PAZ | Pavlovo Bus Factory |
| Paz Vega | Paz Vega |
| Pazin | Pazin |
| Pazuzu | Pazuzu |
| Paços de Ferreira | Paços de Ferreira |
| PBS | Public Broadcasting Service |
| PC | personal computer |
| PC bang | PC bang |
| PC-DOS | IBM PC-DOS |
| PC-speaker | PC speaker |
| PCI | Peripheral Component Interconnect |
| PCI Express | PCI Express |
| PCLinuxOS | PCLinuxOS |
| PCOS | Polycystic ovary syndrome |
| PCR | Polymerase chain reaction |
| PCX | PCX |
| PDC | Personal Digital Cellular |
| PDCA | PDCA |
| PDF | Portable Document Format |
| PdfTeX | PdfTeX |
| PDTV | PDTV |
| Peace and Freedom Party | Peace and Freedom Party |
| Peaches Bartkowitz | Jane Peaches Bartkowicz |
| Peak District | Peak District |
| Peak Lenin | Lenin Peak |
| Pearl Harbor | Pearl Harbor |
| Pearl Jam | Pearl Jam |
| Pearl Jam Official Bootlegs | Pearl Jam Official Bootlegs |
| Peavey | Peavey Electronics |
| PEBKAC | PEBKAC |
| Peclettal | Péclet number |
| Pecorino | Pecorino |
| Pectoralis minor | Pectoralis minor muscle |
| Pectus excavatum | Pectus excavatum |
| pedagog | pedagogue |
| pedagogik | pedagogy |
| pedagogisk | pedagogic |
| pedagogiskt | educationally |
| pedal | treadle |
| Pedal steel guitar | Pedal steel guitar |
| Pedanius Dioskorides | Pedanius Dioscorides |
| pedant | pedant |
| pedanteri | nitpicking |
| pedantisk | punctilious |
| Peder Severin Krøyer | Peder Severin Krøyer |
| Peder Tordenskjold | Peder Tordenskjold |
| pederast | pederast |
| Pedersöre | Pedersöre |
| pediatrik | pediatrics |
| pediatriker | pediatrician |
| pedikyr | pedicure |
