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From: Doug McIlroy <doug@cs.dartmouth.edu>
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Subject: Re: [TUHS] First book on Unix for general readership
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> OK, I've dug out my copies. They have perforated, 3-hole punched pages
...
>  I can't find any obvious typesetting errors.

That sets my mind at rest after three decades. What I saw
back in the day was littered with @ signs, and was not punched
for a ring binder. Thanks for checking.

Doug