IAC - Information Analysis Center.

IANA - Internet Assigned Numbers Authority.

IBG - Interblock Gap (espacio entre bloques)

ICANN - internet Corporation for Assigned Names And Numbers.

ICASE - integrated Computer-Aided Software Engineering.

ICE - Information and Content Exchange.

ICMP - Internet Control Message Protocol.

IDE - Integrated Device Electronics.

IDSL - Internet Digital Suscriber Line (línea de suscriptor digital).

IE - Information Engineering

IEEE -institute of Electrical and Electric Engineers.

IEPG - Intenet Engineering and Planning Group.

IFF - interchange File Format (formato de intercambio de archivos).

IGP - Interior Gateway Protocol.

IGRP - Interior Gateway Routing Protocol .

ILEC - Incumbent Local Exchange Carrier.

IMAP4 - Internet Message Access Protocol 4.

IMHO - In My Humble Opinion (en mi humilde opinión).

IMO - In My Opinion (en mi opinión).

IP - Internet Protocol.

IPng - Internet Protocol Next Generation.

IPX - Internetwork Packet Exchange.

IRC - Internet Relay Chat.

IRL - In Real Life.

ISA - Industry Standart Architecture.

ISO - International Organization of Standarization.

ITSP - Internet Telephony Service Provider.