troff - definizione. Che cos'è troff
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Cosa (chi) è troff - definizione

DEBUGGING COMMAND IN THE BASIC PROGRAMMING LANGUAGE, AN ABBREVIATION OF TRACE ON
TROFF command; TROFF; TRacer ON; TRON (command)

troff         
<text, tool> /T'rof/ or /trof/ The grey eminence of Unix text processing; a formatting and phototypesetting program, written originally in PDP-11 assembly code and then in barely-structured early C by the late Joseph Ossanna, modelled after the earlier ROFF which was in turn modelled after Multics' RUNOFF by Jerome Saltzer (*that* name came from the expression "to run off a copy"). A companion program, nroff, formats output for terminals and line printers. In 1979, Brian Kernighan modified troff so that it could drive phototypesetters other than the Graphic Systems CAT. His paper describing that work ("A Typesetter-independent troff", AT&T CSTR #97) explains troff's durability. After discussing the program's "obvious deficiencies - a rebarbative input syntax, mysterious and undocumented properties in some areas, and a voracious appetite for computer resources" and noting the ugliness and extreme hairiness of the code and internals, Kernighan concludes: None of these remarks should be taken as denigrating Ossanna's accomplishment with TROFF. It has proven a remarkably robust tool, taking unbelievable abuse from a variety of preprocessors and being forced into uses that were never conceived of in the original design, all with considerable grace under fire. The success of TeX and desktop publishing systems have reduced troff's relative importance, but this tribute perfectly captures the strengths that secured troff a place in hacker folklore; indeed, it could be taken more generally as an indication of those qualities of good programs that, in the long run, hackers most admire. groff is GNU's implementation of roff in C++. [Jargon File] (1995-03-21)
TROFF         
Typesetter New Run-OFF (Reference: Unix)
Troff         
troff (), short for "typesetter roff", is the major component of a document processing system developed by Bell Labs for the Unix operating system. troff and the related nroff were both developed from the original roff.

Wikipedia

TRON command

TRON is a debugging command in old dialects of the BASIC programming language. It is an abbreviation of TRace ON. It was used primarily for debugging line-numbered BASIC GOTO and GOSUB statements. In text-mode environments such as the TRS-80 or DOS, it would print the current line number which was being executed, on-screen. In a windowed environment, when the TRON command had been executed, a window would indicate the line number being executed at that instant. This command's opposite is TROFF, or TRace OFF, used to turn off command tracing.

TRON and TROFF were made obsolete by the advent of multitasking windowing environments, which permit a developer to switch back and forth between program output and source code. Modern IDEs take advantage of this to allow far more sophisticated debugging (line-by-line step-through execution of source code, examination/modification of variables, etc.). As a result, TRON/TROFF are no longer supported by most current BASIC dialects, including Microsoft Visual Basic.