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From: well!naimark@apple.com (Michael Naimark)
Newsgroups: sci.virtual-worlds
Subject: Re: Real-Time interaction, Computer Graphics, and Virtual Worlds.
Message-ID: <16357@milton.u.washington.edu>
Date: 13 Feb 91 01:24:27 GMT
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There's an intuitively obvious use of "real time" in cinematography which
may be helpful here. Back in the early days the cameras were hand cranked:
slow motion was achieved by "over-cranking," fast motion by "under-cranking."
When a movie is "not too slow" and "not too fast" it is in "real time." 
(ie., when there exists a temporal correspondence between recording and
playback).