A Character in Neal Stephenson's novel Snow Crash. YT is a teenager, anywhere from age 15 to age 17. She is
a) A runner of sensitive material, working for a company of skateboarding messenger-teens, RaDiks.
b) 'Podner' of Hiro Protagonist, specializing in dirt-side information gathering. An example of this is when a robo-hound breaks in front of YT and Hiro Protagonist, and only YT recognizes that the fact that the robo-hound runs on radioactive material is valuable 'intel'.
c) The sex interest for Raven.

Her name, as far as the reader knows, is Yours Truly.