Others
- Performance-based logistics
- Peripheral blood lymphocyte
- Perverted by Language, an album by the Fall
- Peter Lewis (businessman), an American businessman
- Peer Based Learning
- Phi Beta Lambda
- Philadelphia Belt Line Railroad
- Planetary boundary layer
- Policy Block List
- Polski Blok Ludowy, the Polish name for Polish Peasant Bloc, a short lived political party in Poland
- Problem-based learning
- Project-based learning
- Prototype-based language
- Publishing and Broadcasting Limited
Read more about this topic: PBL