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| TECO /tee'koh/ obsolete [originally an acronym for "[paper] Tape Editor and COrrector"; later, "Text Editor and COrrector"] A text editor developed at MIT and modified by just about everybody. With all the dialects included, TECO may have been the most prolific editor in use before , to which it was directly ancestral. The first editor was written in TECO. It was noted for its powerful programming-language-like features and its unspeakably hairy syntax. TECO programs are said to resemble . It is literally the case that every string of characters is a valid TECO program (though probably not a useful one); one common game used to be mentally working out what the TECO commands corresponding to human names did. As an example of TECO's obscurity, here is a TECO program that takes a list of names such as: Loser, J. Random Quux, The Great Dick, Moby sorts them alphabetically according to surname, and then puts the surname last, removing the comma, to produce the following: Moby Dick J. Random Loser The Great Quux The program is [1 J^P$L$$ J <.-Z; .,(S,$ -D .)FX1 @F^B $K :L I $ G1 L>$$ (where ^B means "Control-B" (ASCII 0000010) and $ is actually an or escape (ASCII 0011011) character). In fact, this very program was used to produce the second, sorted list from the first list. The first hack at it had a : GLS (the author) had accidentally omitted the "@" in front of "F^B", which as anyone can see is clearly the . It worked fine the second time. There is no space to describe all the features of TECO, but it may be of interest that "^P" means "sort" and "J<.-Z; ... L>" is an idiomatic series of commands for "do once for every line". In mid-1991, TECO is pretty much one with the dust of history, having been replaced in the affections of hackerdom by . Descendants of an early (and somewhat lobotomised) version adopted by DEC can still be found lurking on VMS and a couple of crufty s, however, and ports of the more advanced MIT versions remain the focus of some antiquarian interest. See also , . {(ftp://usc.edu/)} for /, , , , . |
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