- Complexion's
- Compliments
- Composites One
- Comprehensive Dental Care
- Comprehensive Financial Services
- Comprehensive Foot Care
- Comprehensive Pain Management
- Comprehensive Psychological Services
- Comprehensive Rehabilitation
- Comprehensive Systems
- Compro Tax
- Compucom Systems
- CompUnet
- Compunet Clinical Laboratories
- Compupharm APS Corporation
- CompUSA
- Compu-Search
- Computax
- Computer Aid
- Computer Associates International
- Computer Business Solutions
- Computer Central
- Computer Clinic
- Computer Consultants
- Computer Corner
- Computer Depot
- Computer Doctor
- Computer Doctors
- Computer Dynamics
- Computer Exchange
- Computer Express
- Computer Guys
- Computer Help
- Computer Horizons Corporation
- Computer House
- Computer Learning Center
- Computer Magic
- Computer Masters
- Computer Medic