- POD (Plan of the Day)
- PODL (Post Overseas Detachment Leave)
- PODS (Publication Ordering And Distribution System)
- POE (Perl Object Environment|| Port Of Embarkation Polyol Ester Power Over Ethernet)
- Poe. (Posse ("To be able", or, "The ability to do a thing"))
- POEM (Play, Organize, Execution, and Manage)
- Poenit. (Poenitentia ("Penance"))
- Poenit. Ap. (Poenitentiaria Apostolica ("Office of the Apostolic Penitentiary"))
- POES (Polar Operational Environment Satellite)
- POET (Population, Organization, Environment, and Technology)
- POETS (Portable Occultation, Eclipse, and Transit electronic-camera System)
- POF (Phase of flight)
