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From: john@datacube.UUCP
Newsgroups: net.arch
Subject: Re: VERY LARGE main memories: crypt
Message-ID: <3200009@datacube>
Date: Fri, 12-Sep-86 02:24:00 EDT
Article-I.D.: datacube.3200009
Posted: Fri Sep 12 02:24:00 1986
Date-Received: Sat, 13-Sep-86 09:51:15 EDT
References: <15505@ucbvax.BERKELEY.EDU>
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Nf-ID: #R:ucbvax.BERKELEY.EDU:15505:datacube:3200009:000:754
Nf-From: datacube.UUCP!john    Sep 12 02:24:00 1986



>As I think I've mentioned before, it is believed that there are
>approximately 2^200 electrons in the universe.  Since it is unlikely that
>anybody would want to reference more things than there are electrons in the
>universe, 200 bits seems like a good upper bound for the length of a memory
>address.
>
>Roy Smith, {allegra,philabs}!phri!roy

Oh, good, there is a physical upper bound! There are about 2^200
electrons in the universe, and the the most efficient possible memory
element uses one electron, then it is impossible to have more than 
2^200 bits of memory :-).

				John Bloomfield

Datacube Inc. 4 Dearborn Rd. Peabody, Ma 01960 	617-535-6644
	
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