PM
- pm – (s) picometre
- Pm – (s) petametre – Promethium
- PM – (s) Panama (FIPS 10-4 country code) – (i) Perry Mason – Phase Modulation – Post Meridiem (Latin "after noon") – Prime Minister – Project Manager – (s) Saint Pierre and Miquelon (ISO 3166 digram)
- PMC – (i) Primary Motor Cortex
- PMCS – (i) Partial Mission Capable Supply (SM&R code) – Power Management Control System – Professional Military Comptroller School
- PME – (i) Professional Military Education
- PMI – (i) Positive Material Identification
- PMID – (p) PubMed Identifier
- PMMA – (i) PolyMethylMethAcrylate
- PMOS – (i/a) P-type/Positive Metal-Oxide-Semiconductor transistor ("pee-moss")
- PMS – (i) Premenstrual Syndrome
- PMSC – (i) NATO Political-Military Steering Committee on Partnership for Peace
- PMSL – (i) Piss Myself Laughing (Internet short-hand)
- PMT - Premenstrual Tension (UK) (see Premenstrual Syndrome)
Read more about this topic: List Of Acronyms And Initialisms: P