I
- IC – Integrated Circuit - Elektronik
- IDE – Intelligent Drive Electronic; Integrated Disk Electronic - Massenspeicher
- IEC – International Electrotechnical Commission
- IEEE – The Institute of Electrical and Electronic Engineers, Inc. New York
- IPSec – Internet Protocol Security - Netzwerk
- IrDA – Infrared Data Association - Multimedia
- IPS – In Plane Switching - Monitor
- IRED – Infrared Emitting Diode - Elektronik
- IRLD – Infrared Laser Diode - Elektronik
- IRQ – Interrupt Request - Mainboard
- ISA – Industrial Standard Architecture - Mainboard
- ISDN – Integrated Services Digital Network - Internet