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From: Ron Natalie 
Newsgroups: net.unix-wizards
Subject: Re:  AT&T and Unix
Message-ID: <7371@brl-tgr.ARPA>
Date: Tue, 15-Jan-85 16:55:50 EST
Article-I.D.: brl-tgr.7371
Posted: Tue Jan 15 16:55:50 1985
Date-Received: Sun, 20-Jan-85 05:05:05 EST
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Organization: Ballistic Research Lab
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You can change the kernel without sources.  There was a nice talk about
installing networking in a binary only unix system using the device
driver interfaces.

-Ron