rot13 = R = round tape

rotary debugger n.

[Commodore] Essential equipment for those late-night or early-morning debugging sessions. Mainly used as sustenance for the hacker. Comes in many decorator colors, such as Sausage, Pepperoni, and Garbage. See ANSI standard pizza.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.