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From: Doug McIlroy <doug@cs.dartmouth.edu>
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Date: Fri, 28 Aug 2020 11:52:16 -0400
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Subject: Re: [TUHS] bare m4 (was BTL summmer employees)
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A modestly corrected and improved version of my bare-m4
program, which quickly builds from nothing to arithmetic on
binary numbers using no builtins other than `define'. is
posted at www.cs.dartmouth.edu/~doug/barem4.txt. (.txt
because browsers balk at .m4)

Doug