0 used as the subject of a verb, or the object of a verb or preposition, to refer to a thing, animal, situation, or idea that has already been mentioned: --
1 used as the subject or object of a verb to represent a phrase at the end of the sentence: --
2 used to talk about the time, date, weather, or distances: --
3 used for describing things or people that are very fashionable, and everyone is interested in them, wants to have them, etc.: --
4 abbreviation for information technology --
5 the thing or animal being spoken about, that has already been mentioned: --
IT is very much a male-dominated industry.
There are various part-time IT courses at the college you could join.
Bob studied mathematics at university, but now he's working in IT.
"Have you written your English essay yet?" "Of course, I finished it last week."