| Abbreviation | Definition |
|---|---|
| CHF | Critical Heat Flux |
| CHI | Ceramic Heat Insulator |
| CHIMES | Center for Heterogeneous Integration of Micro Electronic Systems |
| CHPV | Combined Heat - photovoltaic [solar cells] |
| CHS | Cylinder, Head, and Sector |
| CI | Component Instance |
| CI | Confidence Interval |
| CI | Copper Insert |
| CIB | Constant Impedance Bandpass |
| CIC | Cascaded Integrated Comb |
| CIC | Cleanroom Interface Chamber |
| CID | Charge-Injection Device |
| CIE | Cleveland Institute of Electronics |
| CIE | Computer-Integrated Engineering |
| CIED | Cardiac Implantable Electronic Devices |
| CIED | Cardiovascular Implantable Electronic Device |
| CIF | Capacitor Input Filter |
| CIF | Common Interface Format |
| CIM | Computer Integrated Manufacturing |
| CIND | Constant Impedance Notch Diplexer |