| PBL | Parker Butte Lane 
| Others |
| PBL | Paul B Lee
| Others |
| PBL | Paxton Buckley Loda
| Others |
| PBL | Payload Bay Liner
| Others |
| PBL | Performance Based Logistics
| Others |
| PBL | Performance-Based Logistics
| Others |
| PBL | Peripheral Blood Leukocytes
| Others |
| PBL | Peripheral Blood Lymphocytes
| Others |
| PBL | Pestka Biomedical Laboratories
| Others |
| PBL | Phi Beta Lambda
| Others |
| PBL | Phi Beta Lamda
| Others |
| PBL | Philadelphia Belt Line Railroad
| Others |
| PBL | Philadelphia Belt Line Railroad Company
| Others |
| PBL | Philippine Basketball League
| Others |
| PBL | Phone Book Loader
| Others |
| PBL | Planetary Boundary Layer
| Others |
| PBL | Please Be Learners
| Others |
| PBL | Points Badges and Levels
| Others |
| PBL | Policy Block List
| Others |
| PBL | Poly-Buffered LOCOS
| Others |
| PBL | Positive Behaviour for Learning
| Others |
| PBL | Positive Behaviour Learning
| Others |
| PBL | Positive Behavioural Learning
| Others |
| PBL | Potter Belmar Labs
| Others |
| PBL | Power Basic Library
| Others |
| PBL | Power Builder Library
| Others |
| PBL | Powerbasic library (Genus)
| Others |
| PBL | Precision Biosystems Laboratory
| Others |
| PBL | Premier Basketball League
| Others |
| PBL | Primary Boot Loader
| Others |
| PBL | Primary Brain Lymphoma
| Others |
| PBL | Primary Breast Lymphoma
| Others |
| PBL | Private Brand Labeling
| Others |
| PBL | Problem Based Learning
| Others |
| PBL | Problem-Based Learning
| Others |
| PBL | Process Business Language
| Others |
| PBL | Product BaseLine
| Others |
| PBL | Project Based Learning
| Others |
| PBL | Project Based Lesson
| Others |
| PBL | Psychedelic Boom A Loom
| Others |
| PBL | Public Battle List
| Others |
| PBL | Puerto Cabello, Venezuela
| Others |
| PBL | Punishable By Life
| Others |
| PBL | Put Block
| Others |