| Acronym | Definition |
|---|
| COG | Caught Off Guard (chat/email) |
| COG | Cognitive |
| COG | Children's Oncology Group |
| COG | Council of Governments |
| COG | Church of God |
| COG | Center Of Gravity |
| COG | Chip On Glass |
| COG | Continuity Of Government |
| COG | Cognizant |
| COG | Republic of the Congo (ISO Country code) |
| COG | Cognate |
| COG | Cost Of Goods |
| COG | Child of God |
| COG | City of God |
| COG | Coke Oven Gas |
| COG | Course Over Ground |
| COG | Component Obsolescence Group |
| COG | Coalition of Ordered Governments (Gears of War) |
| COG | City of Glass |
| COG | Council of Governors |
| COG | Clusters of Orthologous Groups |
| CoG | Commodity Grid (Kits) |
| COG | Concours Owners Group (Kawasaki Concours motorcycle) |
| COG | CANDU Owners Group |
| COG | Cost of Gain (in feedyards, cost of cattle divided by pounds gained) |
| COG | Convenience Of the Government |
| COG | Cognizance Symbol |
| COG | Cluster of Orthologous Groups (genetics) |
| COG | Customer-Owned Goods |
| COG | Coalition of Organized Governments (Gears of War) |
| COG | Center of Government |
| COG | Corporal Of the Guard |
| COG | Certificate of Graduation |
| COG | Campaign for Open Government |
| COG | Commander Operations Group (National Training Center, Ft Irwin, CA, USA) |
| COG | Collaborative Operations Group (Disaster Management Interoperability Services DMIS) |
| COG | Canada Organic Growers (organic agriculture association) |
| COG | Chief of the Guard |
| COG | Centralized Ordering Group |
| COG | Current Operations Group |
| COG | Combined Operations Group |
| COG | Common Offset Gather (reflection seismology, GPR) |
| COG | Congress of Gamers (conference) |
| CoG | Communion of Gurhal (Phantasy Star Universe) |
| COG | Compliance Order Guidance |
| COG | Covenant of the Goddess organization |
| COG | Contingency Operations Group |
| COG | CIS Oil and Gas |
| COG | Communication and Outreach Action Group |
| COG | Chernobyl Orphan Group (UK) |
| CoG | Chamber of Gray (Star-Wars forum) |
| COG | Centralized Operations Groups |
| COG | Columbia Owners Group |
| COG | CTF Oversight Group |
| COG | Central Organization Groups |
| COG | Code Officiel Géographique (French: Official Geographic Code) |
| COG | Club Omnisports Gargenville (French sports club) |
| COG | Captain of the Guard |
| COG | Culture of Giving (Boulder, CO) |
| COG | Community Organizing Group |
| COG | Centre Opérationnel de la Gendarmerie (French police operational center) |
| COG | Chemical, Oil and Gas (industry sector) |
| COG | Convention d'Objectifs et de Gestion (French: Agreement on Objectives and Management) |
| COG | Commonwealth Observer Group (various locations) |