| Acronym | Sense | Language | Topics |
|---|---|---|---|
| PIE | Proto-Indo-European | In English | → Linguistics |
| PIE | Publication In Engineering | In English | → Serial publications, periodicals → Applied sciences, technology |
| PIE | Pistolet à Impulsions Électroniques | In French | → Military engineering |
| PIE | Payload Integration Equipment | In English | → Astronautics |
| PIE | Payload Interface Engineer | In English | → Astronautics |
| PIE | Postulated Initiating Event | In English |