A computer, usually old or out dated but not always, that is used to experiment and/or test out OSs, modding, programs, coding, and much more without the worry of losing valuable info or damaging expensive hardware and software.
Guy1: Dude, have you seen how cool windows 7 is going to be?
Guy2: Seen it? I just installed the release candidate on my sandbox computer to test it out.
by DarkTavern February 25, 2010

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