sort by Rank | Alpha
| Possible Meanings | Rank |
| Computerized Home Approved Office Section | **** |
| Cheap Array of Obsolete Systems | *** |
| Centre for Hyperincursion and Anticipation in Ordered Systems | *** |
| Cal Hiking and Outdoor Society | *** |
| Confusion Hubbub and Order Scale | ** |
| Colorado Hiking and Outdoor Society | ** |
| Chiefs Have Arrived on Scene | ** |
| Cambridge Heart Anti Oxidant Study | ** |
| Chapel Hill Astronomical and Observational Society | ** |
| Congenital High Airway Obstruction Syndrome | ** |
| Cant Have Anyone Over Syndrome | ** |
| CHange Agents in Our Schools | ** |
| Create Havoc Around Our Systemtm | ** |
| Clustered High Availability Operating System | ** |
| Chief Has Arrived on the Scene | * |
| Christ Honored and Others Served | * |
| California Handlers Advanced Obedience School | * |
| Chemistry of Halogen Oxides in the Stratosphere | * |