OLC is a three-letter initialism (TLA) that may refer to:
Oak leaf cluster, a military decoration Office of Legal Counsel in the U.S. Department of Justice Ohio Library Council, professional association for librarians in Ohio Online Contest (gliding), a glider, hang glider, and paraglider soaring competition Online creation, a software feature in MUDs that allows editing the world while interacting with it Online Learning Consortium, a professional organization promoting online education Open Location Code, a system for identifying a place on Earth Open-loop controller, a system controller that does not use feedback Optical lattice clock, a type of optical clock The Oriental Land Company
See also
OLCS (Our Lady's Convent School), Loughborough, Leicestershire, England, UK Olcs (village), Vața de Jos Commune, Hunedoara County, Transylvania Region, Romania