Also found in: Dictionary, Thesaurus, Medical, Acronyms, Wikipedia.


(editor, text)
/tee'koh/ (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 Emacs, to which it was directly ancestral. The first Emacs editor was written in TECO.

It was noted for its powerful programming-language-like features and its unspeakably hairy syntax (see write-only language). TECO programs are said to resemble line noise. Every string of characters is a valid TECO program (though probably not a useful one); one common game used to be predict 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 alt 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 bug: GLS (the author) had accidentally omitted the "@" in front of "F^B", which as anyone can see is clearly the Wrong Thing. It worked fine the second time. There is no space to describe all the features of TECO, but "^P" means "sort" and "J<.-Z; ... L>" is an idiomatic series of commands for "do once for every line".

By 1991, Emacs had replaced TECO in hacker's affections but descendants of an early (and somewhat lobotomised) version adopted by DEC can still be found lurking on VMS and a couple of crufty PDP-11 operating systems, and ports of the more advanced MIT versions remain the focus of some antiquarian interest.

See also retrocomputing.

ftp://usc.edu/ for VAX/VMS, Unix, MS-DOS, Macintosh, Amiga.


(Text Editor and COrrector) A text editor written in 1963 by Dan Murphy at MIT for editing paper tape on a Digital PDP-1 computer (it was originally called "Tape Editor and Corrector"). Seeming primeval compared to today's editors, TECO worked on only one page at a time using cryptic one and two-character commands. A macro capability was added to TECO by Richard Stallman, creating the first Emacs editor, which he later rewrote for the GNU Project. See Emacs and TOPS.
References in periodicals archive ?
Transmeta continues to team with leading companies such as TECO to expand opportunities for our Crusoe and Efficeon processors in major worldwide markets," said Arthur L.
As one of the world's leading motor manufacturers, it is vital for TECO to continually seek to improve in its product design and development processes," said Francis Bernard, executive committee advisor, Dassault Systemes.
Morgan Securities acted as TECO Energy's financial advisor and Skadden, Arps, Slate, Meagher & Flom acted as legal advisors.
TECO Maritime entered the deal via its wholly-owned subsidiary TECO Maritime Holding AS, which will continue to focus on marine electronics, as well as cleaning & cargo handling.
TECO Energy Chief Executive Officer John Ramil said, This transaction will result in a complete exit from the coal mining business.
Sandra Callahan, TECO CFO and senior vice president of finance and accounting, said that although the company's average selling price of coal was about $94/ton in the second quarter, it was still below the slightly less than $96/ton average price expected for the full year.
Norwegian ship maintenance company TECO Maritime ASA (OSE:TECO) said on Thursday (22 January) that its ballast tank maintenance subsidiary, TECO Coating Services AS, has secured a EUR1.
Norwegian ship maintenance company TECO Maritime ASA (OSE: TECO) issued on Friday (29 August) its report for the first half of the year, posting an operating loss (EBIT) of NOK10.
M2 EQUITYBITES-June 9, 2015-TECO Energy's subsidiary signs LOI for TECO Coal