English abbreviations from prl to proc
- PRL (Physical Review Letters)
- PRLDEF (Puerto Rican Legal Defense and Education Fund)
- PRLG (People's Revolutionary League of Ghana)
- PRM (Personnel Readiness Management)
- PRMD (Private Management Domain)
- PRMFL (Perm File)
- PRML (Partial Response Maximum Likelihood)
- PRMS (Personnel Recovery Mission Software)
- PRN (pro re nata (Latin, "for the emergency", "as needed"))
- PR.N. (Pridie Nonas ("The Day Before the Nones"))
- P-RNAV (precision area navigation)
- PRNG (Pseudo Random Number Generators)
- PRO (Peer review organization)
- PROA (Pennsylvania Residential Owners Association)
- PROBE (Personal Research On Basically Everything)
- PROBSUB (Probable Submarine)
- PROC (Puerto Rican Operations Center)