IE

1. Abbreviation for Microsoft Internet Explorer that was first introduced in August of 1995.
2. Latin for id est, which translates to "that is", i.e. is used as an abbreviation for "in other words", "in this case", "that is", and "to say". For example, Firefox is an Internet browser i.e., a software program that allows you to surf the Internet.

Also see: Browser, e.g.