On is the title of a 1993 EP by the British electronic music artist Richard D. James, more commonly known by his recording alias of Aphex Twin. It was released on 15 November 1993 by Warp Records. On Remixes, featuring remixes by James, Reload and µ-Ziq, was also released on the same day.
Released after his album Selected Ambient Works 85–92, and just before his follow-up, Selected Ambient Works Volume II, On is often described as ambient techno despite the presence of harsh, abrasive beats on the title track. The title "On" is only mentioned once in the track list of the On EP.