| Abbreviation | Definition |
|---|---|
| IANA | Internet Assigned Numbers Authority |
| IA-PC | Intel Architecture Personal Computer |
| ICM | Image Color Management |
| IDG | Independent Drivers Guild |
| IE | Information Element |
| IFSC | Information Field Size integrated circuit Card |
| IFSD | Information Field Size Device |
| IGD | Internet Gateway Device |
| IHV | Independent Hardware Vendor |
| IID | Interface IDentifier |
| IM | InterMediate |
| INCITS | INternational Committee for Information Technology Standards |
| IO/MMIO | Input/Output or Memory - Mapped Input/Output |
| IOCTL | Input/Output Control |
| IR | InfraRed |
| IRDS | Irish Rally Drivers Scheme |
| IrLAP | Infrared Link Access Protocol |
| IrLMP | Infrared Link Management Protocol |
| IRP | I/O (Input/Output) Request Packet |
| IrPHY | Infrared Physical Layer Link Specification |