PBO
- AMD
- Barack Obama
- Bohemia Interactive Studio
- Lead(II) oxide
- OpenGL
- Paraburdoo Airport
- Parliamentary Budget Office
- Parliamentary Budget Officer
- Peterborough railway station
- Philharmonia Baroque Orchestra
- Pine Bluff Observatory
- Pinoy Box Office
- Piperonyl butoxide
- Pixel buffer objects
- Plate Boundary Observatory
- Portland Bird Observatory
- Precision Boost Overdrive
- Public Benefit Organization
- Push Button Objects
- US-GAAP
- Zylon