~ATH (pronounced till death—the tilde isn't silent) is a programming language in the Homestuck universe. Its name is a reference to how programs written in it function. Programs written in ~ATH are tied to the lifespan of an object and run in an infinite loop until the death or destruction of the object at which point the code is executed. John and Karkat try, unsuccessfully, to use ~ATH. However, Sollux is shown to be "obnoxiously good" with it, and Roxy is shown to be able to program it successfully.