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From: Jon Steinhart <jon@fourwinds.com>
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Comments: In-reply-to Douglas McIlroy <douglas.mcilroy@dartmouth.edu>
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Date: Sun, 23 Jan 2022 14:26:58 -0800
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Subject: Re: [TUHS] troff environments, traps,
 and diversions (was: TeX and groff)
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Thinking about it some more, I think that it would help to talk about
traps as interrupts or events.  That works well with thinking about
macros as functions as traps essentially fire of interrupt handlers
which are macros.