From: utzoo!watmath!jcwinterton
Newsgroups: net.followup
Title: Re: A strange idea for a new type of memory
Article-I.D.: watmath.3751
Posted: Sun Oct 31 16:13:16 1982
Received: Mon Nov  1 00:25:33 1982
References: unc.4143

	Photochromic reversal memories are hardly new.  National Cash Register
did a lot of work on them about the time I was using an NCR315 working in a
bank.  That was the early to mid '60s.  Maybe someone should ask them what
they found out.  I gather it had both a speed and permanence problem and was
subsequently dropped....
John Winterton.