| Acronym | Definition |
|---|
| COOL | Country of Origin Labeling |
| COOL | Conservation Online |
| COOL | Community of Online Learners |
| COOL | Concurrent Object Oriented Language (programming) |
| COOL | Clips Object Oriented Language |
| COOL | Classroom Object Oriented Language |
| COOL | Combined Object Oriented Language |
| COOL | Comprehensive Object Oriented Learning |
| COOL | Control Oriented Ontology Language |
| COOL | Credentialing Opportunities Online (US Army) |
| COOL | Campus Outreach Opportunity League (est. 1984) |
| COOL | College Opportunities Online Locator (US Department of Education) |
| COOL | Coastal Ocean Observation Laboratory (Rutgers University Institute of Marine and Coastal Sciences) |
| COOL | Climate Options for the Long Term |
| COOL | Clips Object-Oriented Language |
| COOL | Commerce Opportunities On-Line |
| COOL | Consortium of Ontario Libraries |
| COOL | Chorus Object Oriented Layer |
| COOL | Constipated Overrated Outdated Loser |
| COOL | Constipated, Overweight, Overrated, Loser |
| COOL | COBOL Object-Oriented Language |
| COOL | Constipated Overweighted Out-Of-Style Loser |
| COOL | Christ Over Our Life |
| COOL | Central Online and Open Access Library |
| COOL | Constipated Overweight Old Lady |
| COOL | Chance of Optimal Leverage |
| COOL | (I have a) Call On Other Line |
| COOL | Constipated Out of Style Loser |
| COOL | Calendar of Optimal Learning (Lincoln School schedule; Cadillac, MI) |
| COOL | USAF Programs Connected With Alaskan Air Command |