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(language, programming, testing, tool)
(TRace ON) A command used when debugging programs written in early line-numbered BASIC that contained GOTO and GOSUB statements.

When the TRON command had been executed, the program ran with a window open indicating the line number being executed at that instant.

The TROFF (an abbreviation for "TRace OFF") command turned the tracing off.


(NRL, CMU, probably from the film "Tron") To become inaccessible except via electronic mail or talk especially when one is normally available via telephone or in person.

Compare spod.
This article is provided by FOLDOC - Free Online Dictionary of Computing (


(1) (TRace ON) A debugging command in the BASIC programming language that displays each instruction with its line number when executing. TROFF (trace off) turns off the debugging mode. In the 1982 science fiction film TRON, TRON is a security program used to shut down a malevolent supercomputer.

(2) (The Realtime Operating System Nucleus) An advanced real-time operating system developed by Japanese universities and corporations. i-TRON is a version that is used for microcontrollers in industrial machinery.
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