PRL
PRL stands for:
- Physical Review Letters , a journal in physics
- Prolactin , a mammotropic hormone
- Polska Rzeczpospolita Ludowa , in German People's Republic of Poland
- Proportional reduction in loss
- Primary control reserve in energy technology, see control reserve (power grid) # Primary control
prl stands for:
- Peruvian Sign Language (ISO-639-3 code), Sign Language
