- PBL
- Problem Based Learning (Community » Educational)* Peripheral Blood Lymphocytes (Medical » Physiology)* Project Based Learning (Community » Educational)* Planetary Boundary Layer (Academic & Science » Ocean Science)* Peripheral Blood Leukocytes (Medical » Physiology)* Product BaseLine (Governmental » Military)* Product BaseLine (Governmental » US Government)* Product BaseLine (Governmental » NASA)* Poly- Buffered LOCOS (Academic & Science » Electronics)* Pestka Biomedical Laboratories (Business » Firms)* Powerbasic library (Genus) (Computing » File Extensions)* Puerto Cabello, Venezuela (Regional » Airport Codes)* Philadelphia Belt Line Railroad Company (Regional » Railroads)* Psychedelic Boom A Loom (Community » Law)
Abbreviations dictionary. 2012.