| Acronym | Definition |
|---|
| C&I | Commercial & Industrial |
| C&I | Curriculum & Instruction |
| C&I | Cost & Insurance |
| C&I | Communication and Information |
| C&I | Creativity and Innovation |
| C&I | Consumer and Industrial |
| C&I | Control & Instrumentation (engineering) |
| C&I | Construction & Installation |
| C&I | Conference & Incentive |
| C&I | Consulting & Integration |
| C&I | Criteria & Indicators (sustainable forest management) |
| C&I | Careless and Imprudent (driving offense) |
| C&I | Complaints and Investigations |
| C&I | Construction and Inspection |
| C&I | Certification & Inspection |
| C&I | Corrosion & Inspection (engineering) |
| C&I | Camden and Islington (Mental Health Trust) |
| C&I | Chemistry & Industry Magazine (Industrial chemistry magazine published in London) |
| C&I | Compatibility & Interoperability |
| C&I | Commands and Indications |
| C&I | Contests and Incentives |
| C&I | Checkout & Integration |
| C&I | Concepts and Initiatives |