:TechRef: /tek'ref/ [MS-DOS] n. The original `IBM PC Technical Reference Manual', including the BIOS listing and complete schematics for the PC. The only PC documentation in the issue package that's considered serious by real hackers.
:TECO: /tee'koh/ obs. 1. vt. Originally, to edit using the TECO editor in one of its infinite variations (see below). 2. vt.,obs. To edit even when TECO is *not* the editor being used! This usage is rare and now primarily historical. 2. [originally an acronym for `[paper] Tape Editor and COrrector'; later, `Text Editor and COrrector'] n. A text editor developed at MIT and modified by just about everybody. With all the dialects included, TECO might have been the most prolific editor in use before {EMACS}, to which it was directly ancestral. Noted for its powerful programming-language-like features and its unspeakably hairy syntax. It is literally the case that every string of characters is a valid TECO program (though probably not a useful one); one common hacker 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 {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 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 {EMACS}. Descendants of an early (and somewhat lobotomized) version adopted by DEC can still be found lurking on VMS and a couple of crufty PDP-11 operating systems, however, and ports of the more advanced MIT versions remain the focus of some antiquarian interest. See also {retrocomputing}, {write-only language}.