C/I
| Acronym | Definition |
|---|---|
| C/I | Commercial/Industrial |
| C/I | Commercial Invoice |
| C/I | Carrier to Interference (Ratio) |
| C/I | Cost/Income |
| C/I | Consent of Instructor |
| C/I | Classification/Identification |
| C/I | Civil Infraction |
| C/I | Counter-Indication |
| C/I | Communication Instrumentation |