| I/O | Input/Output | - | Computer and Internet |
| ICANN | Internet Corporation For Assigned Names And Numbers | - | Computer and Internet |
| ICF | Internet Connection Firewall | - | Computer and Internet |
| ICMP | Internet Control Message Protocol | - | Computer and Internet |
| ICS | Internet Connection Sharing | - | Computer and Internet |
| IDE | Integrated Device Electronics | - | Computer and Internet |
| IDE | Integrated Development Environment | - | Computer and Internet |
| IEEE | Institute Of Electrical And Electronics Engineers | - | Computer and Internet |
| IGP | Integrated Graphics Processor | - | Computer and Internet |
| IM | Instant Message | - | Computer and Internet |
| IMAP | Internet Message Access Protocol | - | Computer and Internet |
| INTERNIC | Internet Network Information Center | - | Computer and Internet |
| IP | Internet Protocol | - | Computer and Internet |
| IPX | Internetwork Packet Exchange | - | Computer and Internet |
| IRC | Internet Relay Chat | - | Computer and Internet |
| IRQ | Interrupt Request | - | Computer and Internet |
| ISA | Industry Standard Architecture | - | Computer and Internet |
| ISCSI | Internet Small Computer Systems Interface | - | Computer and Internet |
| ISDN | Integrated Services Digital Network | - | Computer and Internet |
| ISO | International Organization For Standardization | - | Computer and Internet |
| ISP | Internet Service Provider | - | Computer and Internet |
| IT | Information Technology | - | Computer and Internet |
| IVR | Interactive Voice Response | - | Computer and Internet |
