- PERMS (Personnel Electronic Records Management System)
- PERN (Preliminary Engineering Release Notice)
- PERP (Perpetrator)
- Perpes (Humorous nickname for PRP, take on herpes)
- PERR (Preliminary Engineering Research Report)
- PERRLA (Pupils equal, round, reactive to light and accommodation)
- PERRMS (PERsonnel Resource Management System)
- PERS (Personal Emergency Response System)
- PERSACS (Personnel Structure and Composition System)
- PERSCO (Personnel Support For Contingency Operations)
- PERSCOM (PERSonnel COMmand)
- PERS DET (Personnel Detachment)
- PERSIB (Persatuan Sepak Bola Indonesia Bandung)
- PERSINS (Personnel Information System)
- PERSISTA (Political, Economic, Religious, Social, Intellectual, Scientific, Technological, Artistic)
- PERSITREP (PERSonnel SITuation REPort)
- PERSLOG (Personnel and Logistics)
- PERSREP (Personnel Report)
- PERSSO (Personnel System Staff Officer)
- PERT (Party Evaluation And Rsvp Training)
- PERTCO (Program Evaluation And Review Technique With Cost)
- PERTO (Pertaining To ....)
- PERTSIM (Program Evaluation and Review Technique Simulation)
- PERT-TAM (Program Evaluation and Review Technique - Task, Action, and Milestone items)
- PERUSA (Perspectives - United States of America history course)
- PES (PolyEtherSulfone)
- PESA (Passive Electronically Scanned Array)
- PESGB (Petroleum Exploration Society of Great Britain)
- PESS (Physical Education And School Sport)
- PEST (UK Public Engagement with Science and Technology)
