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- 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 "(a)" 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. [authro? home page?] last updated: 2001-03-26
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Từ điển Máy Tính - Foldoc Dictionary
virtual reality
virtual reality (VR) 1. (application) Computer simulations that use 3D graphics and devices such as the data glove to allow the user to interact with the simulation. 2. (games) A form of network interaction incorporating aspects of role-playing games, interactive theater, improvisational comedy, and "true confessions" magazines. In a virtual reality forum (such as Usenet's news:alt.callahans newsgroup or the MUD experiments on Internet and elsewhere), interaction between the participants is written like a shared novel complete with scenery, "foreground characters" that may be personae utterly unlike the people who write them, and common "background characters" manipulable by all parties. The one iron law is that you may not write irreversible changes to a character without the consent of the person who "owns" it, otherwise, anything goes. See bamf, cyberspace. [Jargon File] Last updated: 1995-01-30
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