PB
- Pb – (s) Lead (Latin Plumbum)
- PB – (p) PolyButylene
- PBA
- (i) Philippine Basketball Association
- Professional Bowlers Association
- PBB – (p) PolyBrominated Biphenyl
- PBCK – (i) Problem Between Chair and Keyboard (computer help desk in-joke)
- PBD – (p) PolyButaDiene
- PBDE – (i) PolyBrominated Diphenyl Ether
- PBI – (p) PolyBenzImidazole
- PBN – (p) PolyButylene Naphthalate
- PBOH – (i) Please Become Old History
- PBR
- (i) Pabst Blue Ribbon (beer brand)
- Professional Bull Riders
- PBS
- (i) Pharmaceutical Benefits Scheme (Australia)
- Public Broadcasting Service (U.S.)
- Public Broadcasting Services (Malta)
- PBRT - may stand for: Physically Based Raytracing, an open source software rendering system for physically correct image synthesis.
- PBT – (p) PolyButylene Terephthalate
- PBX – (p) Private Branch eXchange (company phone system)
Read more about this topic: List Of Acronyms And Initialisms: P