| Abbreviation | Definition |
|---|---|
| BYOI | Be Your Own Inspector |
| BYOI | Build Your Own Identity |
| C | Capital |
| C | Catastrophe |
| C | Classification |
| C | Collaboration |
| C | Comfort |
| C | Complete |
| C | Concern |
| C | Coordination |
| c | copy |
| C | Corporate |
| C | Counsel |
| C | Customer |
| C&E | Cause and Effect |
| C&EA | Cause and Effect Analysis |
| c.o.d. | cash on delivery |
| C/O | Call On (date) |
| C2B | Customer To Business |
| C2C | Customer to Customer |