Institution
- Combion Inc.1
- Combustion Institute1
- Commission on the Organization of the Government of the District of Columbia1
- Committee on Scholarly Communication with the People's Republic of China (U.S.)1
- Community College of Philadelphia1
- Compagnie générale d'électricité1
- Computer Aids for Chemical Engineering (CACHE)1
- Computer Application Technology1
- Connecticut Agricultural Experiment Station1
- Connecticut College1
- Connecticut Instrument Corporation1
- Consolidated Biomedical Laboratories, Inc.1
- Consolidated Engineering Corporation, Analytical Instruments Division1
- Constock Liquid Methane Corporation1
- Constock-Pritchard Corporation1
- Continental Aviation1
- Continental Oil Company1
- Cook College1
- Cooper Engineering Company1
- Cosden Oil Company1