| Computer Workware | |
| Computer-Human Interaction in the Ottawa Area | Ontario |
| Computerdoc | British Columbia |
| ComputerDr | Ontario |
| ComputerEase | Nova Scotia |
| Computerisms | |
| Computerized Business Solutions, Inc. | Nova Scotia |
| Computerlink Systems, Inc. | Ontario |
| ComputerPlus | Ontario |
| ComputerRack | Alberta |
| ComputerRentals.ca | Alberta |
| ComputerRescue.ca | British Columbia |
| Computers & Peripherals Multimedia Centre | Ontario |
| Computers for Kids | Ontario |
| Computers for Schools Manitoba | Manitoba |
| Computers for Schools NL | Newfoundland and Labrador |
| Computers for Schools Yukon | |
| Computers on Wheels | British Columbia |
| Computers Plus Components, Inc. | Ontario |
| ComputerSupport.ca | Ontario |
| ComputerTech Experts | New Brunswick |
| ComputerXS | Ontario |
| Computexpert | Quebec |
| CompuTouch Ltd | Alberta |
| Computrack Solutions | |
| Computronic | Ontario |
| Computronix | Alberta |
| Compuville Systems | |
| Compuwork | British Columbia |
| CompuWork Pacific, Inc. | |
| CompuWork Services | British Columbia |
| Compuzonic | Ontario |
| Comrie Software Solutions | Alberta |
| Comsense, Inc. | Ontario |
| Comsoft Services | Quebec |
| ComTec Computers | Ontario |
| ComTech | British Columbia |
| Comtech (Communication Technologies) Ltd | |
| Comtech Canada | Ontario |
| Comtech Communications Technologies Ltd | Alberta |
| Comtech Group, Inc. | |
| Comtech Informatique, Inc. | Quebec |
| Comtest | Ontario |
| Comtest Networks | Ontario |
| Comtree, Inc. | Ontario |
| Comtronic | Ontario |
| ComVida Corporation | British Columbia |
| Comwave Networks, Inc. | Ontario |
| Comwell Systems Corporation | British Columbia |
| Comworker | |