This article is too damned short, Marine! You will help Gruntipedia by so it will fit the screen, fool!
A.I. stands for "Ass-Rape Intelligence". They are notorious for causing endless arguments and yelling in your ear when you really don't want it.
Apparently they were made as a sort of GPS system for N00bs, but a few turned out to be uber hotness and the only female voice that said noobs would ever hear. They also have a capability to endlessly bitch and tape over DVDs. One AI, AngryN00bis, is famous for Shoop da whooping a whole platoon of marines when he heard Cortana was having a affair.