Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bionet!ames!vsi1!daver!mips!prls!gordon
From: gordon@prls.UUCP (Gordon Vickers)
Newsgroups: sci.space.shuttle
Subject: Re: Re^2: Hubble Space Telescope
Message-ID: <24043@prls.UUCP>
Date: 21 Jul 89 18:06:08 GMT
References: <351@aeras.UUCP> <2983@helios.ee.lbl.gov> <23692@prls.UUCP> <1566@bucket.UUCP> <7310@bunny.GTE.COM>
Reply-To: gordon@prls.UUCP (Gordon Vickers)
Organization: Philips Research Labs, Sunnyvale, California
Lines: 13

In article <7310@bunny.GTE.COM> s914@GTE.COM (Lawrence Bilker) writes:
>I read somewhere that it is a class 10,000 clean room.  Which is even more
>expensive than a class 100 clean room!

     With regards to clean rooms, I believe that "class xxx" refers to
   the maximum permitted dust level expressed in parts per million.
   That is, a class 10,000 clean room is one specified to have less
   than 10,000 parts per million dust, and only 100 parts per million
   for a class 100 clean room.

Gordon Vickers 408/991-5370 (Sunnyvale,Ca); {mips|pyramid|philabs}!prls!gordon
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