O.c.s.

OCS or Ocs may refer to:

Places

Öcs, a village in Veszprém county, Hungary
Outer Continental Shelf, a maritime federal land zone beyond the jurisdiction of the United States

Open Collaboration Services, for integration of web services and communities into desktop and mobile applications, an open and vendor-independent API
Office of the Chief Scientist (Australia), a part of Department of Innovation, Industry, Science and Research
Original Chip Set, used in the earliest Commodore Amiga computers
Carbonyl sulfide, a chemical compound with the formula OCS
Microsoft Office Communications Server, a software product
OCS Inventory (Open Computer and Software Inventory), an application which inventories IT assets
Online charging system, a system allowing providers of communication services to charge customers based on service usage
Overhead contact system, a system which provides electric power to trains

Officer candidate school, a training establishment in many countries where military officers are trained
Oklahoma Christian School
Old Cliftonian Society, the society for the alumni of Clifton College, Bristol, England
Opelika City Schools, a school district headquartered in Opelika, Alabama, United States
Senator O'Connor College School in Toronto, Ontario, Canada

Corisco International Airport, IATA airport code "OCS"
Federation of Old Cornwall Societies or sometimes OCS, a Cornish history charity
OCS (TV network), defunct French TV network
Old Church Slavonic, a Slavic language which developed in the 9th century
Office of Community Services, a US Federal Government agency
On course side, a term meaning that a sailboat has crossed the start line of a race early
Operational Combat Series, a game series from The Gamers and Multi-Man Publishing