I'm working on redesigning a website that uses the term "screen name" rather than "username". Personally, I am more used to seeing and using "username". The last time I regularly used "screen name" was back in the '90s with AOL. However, that is just my personal opinion. I'm curious how others feel about it - which term do you tend to use? Are "username" and "screen name" exactly equivalent or would you use them differently - e.g. "screen name" for chat programs but "username" for websites?