Other Uses
- CAMPUS Magazine Online
- Civil-military operations, activities of a military force
- Collateralized mortgage obligation
- Charter Management Organization, in American education refers to the operator of a charter school
- Commodore's Messenger Organization, a high-ranking group with the Scientology Sea Organisation
- Congressional caucus, or a congressional member organization
- Contract manufacturing organization, a pharmaceutical manufacturing outsourcing organization
- Cripple Mr Onion, a fictional card game in the Discworld universe
- Chicago, St. Paul, Minneapolis and Omaha Railway
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