OCM

OCM may refer to:


 * Observe, copy, modify, also known as observe, imitate, modify.
 * OCM (gene), also known as LOC4951, a human gene
 * O'Callaghans Mills, a small village in Ireland (local folkloric slang)
 * Occupy Central Movement
 * Ocean Colour Monitor, an instrument launched on the IRS-P4 satellite on 1999-May-26
 * Office for Coordination and Management, a component of the European Space Agency
 * Ohio Community Media, a newspaper company in the United States
 * Oil cleansing method, an alleged skin-cleansing method
 * Oil content meter, a measuring device used on Marine Oily Water Separators
 * Oil-Cut Mud, in oil drilling parlance
 * Oka Chinna Maata,
 * Olympic Council of Malaysia
 * On-camera meteorologist
 * One Caribbean Media
 * Online Condition Monitoring, for maintenance
 * Open Cloud Manifesto, also known as the Cloud Computing Manifesto
 * Optical Channel Monitor, a device for optical performance monitoring in fiber-optic communications networks
 * Oracle Certified Master, a designation in the Oracle Certification Program
 * Oracle Configuration Manager, a service of Oracle Corporation
 * Ordo Sancti Constantini Magni, Order of Saint Constantine the Great
 * Organisation civile et militaire (English "Civilian and Military Organisation"), a group of the French Resistance
 * Organizational Change Management
 * Oriental Carpet Manufacturers, a London-based company involved in the production of, and trade with, Oriental carpets
 * Original component manufacturer
 * Oxidative coupling of methane
 * Boolgeeda Airport, IATA airport code "OCM"