| Abbreviation | Definition |
|---|---|
| IQN | Iscsi Qualified Name |
| IRDA | Infrared Data Association |
| IRDP | ICMP Router Discovery Protocol |
| IREG | International Roaming Experts Group |
| IRIN | Integrated Regional Information Network |
| IRIS | Infrastructure for Resilient Internet Systems |
| IRIS | Integrated Routing and Intelligent Switching |
| IRLP | Internet Radio Linking Project |
| IRN | In Room Networking |
| IRRS | Intelligent Remote Reboot Switch |
| IS | Integrated System |
| IS | Internet Server |
| ISA | Industry Standard Architecture |
| ISA | Internet Security and Acceleration |
| ISAKMP | Oakley-Internet Security Association and Key Management Protocol / Oakley |
| ISB | Internet Sharing Box |
| ISBG | Inter-Sub-Block Gap |
| ISC | The International Softswitch Consortium |
| ISCW | Implementing Secure Converged Wide Area Networks |
| ISDN | Integrated Service Digital Network |