What does PAST stand for?

exPeriencing Archaeology through Space and Time - A digital library forum (AHDS)

Pacific/Asian Strategy for Tomorrow (SAUS)

Passerini's Tanager - Common English name - Scientific name: Ramphocelus Passerinii - American Ornithologists Union four-character bird identification (IBP)

Pasteurella - Genus of bacteria

Pastillus - A Lozenge, Troch, Pastil - Pharmacy (ROG)

Pastime Manufacturing Company - NCIC trailer make code

Pastorate

Periodic Acid-Schiff Technique - Medicine (DMAA)

Portable Arming System Trainer (MCD)

Process Accessible Segment Table

Professor of Air Science and Tactics

Propulsion and Associated Systems Test (MCD)

Pastoral Epistles (BJA)