What does OHL stand for?

Oberste Herresleitung - Supreme Headquarters - German (AD)

Occupational Health Laboratory (SAUS)

Occupational Hygiene Laboratory (SAUS)

Officer Hand Launcher - Police and security equipment

Ontario Hydro Library - UTLAS symbol

Oral Hairy Leukoplakia - Medicine

Overhaul

Oxford Higher Local Examination - British (ROG)