In the UK, it varies. At large companies, "IT" is roughly analogous to the US usage — think "The IT Crowd", for example. Amongst the general populace, it varies

In the UK, it varies. At large companies, "IT" is roughly analogous to the US usage — think "The IT Crowd", for example. Amongst the general populace, it varies. Those who work at large companies might draw a distinction, for many it simply means "works on computers doing stuff I don't understand". It has very derogatory connotations in general. I spent a lot of time trying to correct people and always referred to myself as a Developer or, occasionally, Software Engineer, never "someone who works in IT".