OMM

OMM may refer to:
 * O'Melveny & Myers, a US law firm with a worldwide practice
 * Object memory model, a structure model for digital object memories
 * The Observer Music Monthly, the British monthly music magazine found in The Observer newspaper
 * Obstacle mobility model, a type of mobility model
 * Of Mice and Men, a novella written by Nobel Prize-winning author John Steinbeck
 * Of Mice & Men (band), (often abbreviated OM&M) an American metalcore band
 * Of Monsters and Men, an Icelandic indie band
 * Old Man Murray, a gaming website
 * OMM, a godlike character with a visual representation resembling Jesus in the film THX 1138
 * One Magnificent Morning, an American programming block that airs Saturday mornings on the owned-and-operated stations and affiliates of The CW
 * The One Million Masterpiece, the world's largest collaborative art project
 * The Original Mountain Marathon, a multi-day running event and a precursor to adventure racing
 * One Million Moms, a U.S. conservative group
 * Open music model, a business model for the digital distribution of music
 * The QualiPSo OpenSource Maturity Model
 * Order of Military Merit (Canada), a Canadian military honour (post-nominal letters)
 * Organisation météorologique mondiale, French for World Meteorological Organization
 * Organização da Mulher Moçambicana, Portuguese for Organization of Mozambican Women
 * Osteopathic manipulative medicine, a core technique of osteopathy and osteopathic medicine in the United States
 * Outer mitochondrial membrane