1) Ass To Mouth: Porn or Hardcore Sex, Man Pulls penis out depths of a womans ass and immediately puts in the womans mouth. A degrading act.
2) Doing the same thing to investors.
3) Asycronous Transfer Mode - A high speed optical communication protocol based on 53 byte packets, screwed up by the Europeans.
4) Automated Teller Machine dispensing yuppie food coupons