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[bug #42473] \(sq is historically a filled square if the font is bold

From: G. Branden Robinson
Subject: [bug #42473] \(sq is historically a filled square if the font is bold
Date: Mon, 6 Jun 2022 03:24:17 -0400 (EDT)

Follow-up Comment #7, bug #42473 (project groff):

I keep finding things.  (I should probably stop and take a breath but this
document dump of the "Unix 4.0" manuals is like a kid's Christmas for me.)
I now think the filled-ness of the \(sq glyph in boldface was

Why?  See the annotated table of contents for the aforementioned manuals.


I'll "quote" it with another attachment.

For those without image support, it appears these manuals were typeset with
the Autologic APS-5, one of the first targets for device-independent troff
(after the C/A/T).

This also explains the addition of the word "original" before "Special
Mathematical Font" in the explanatory paragraph for Table 1 in comment #4. 
Contrast with the same paragraph in comment #3.

This is also consistent with the Murray Hill Bell Labs folks being so keen to
reverse engineer the font data format as documented in the famous, and for a
long time samizdat, paper "Experience with the Mergenthaler Linotron 202
Phototypesetter, or, How We Spent Our Summer Vacation" by Condon, Kernighan,
and Thompson.  Why pay a foundry exorbitant prices to code you a bespoke
typeface when you can do it yourself?


(file #53282)


Additional Item Attachment:

File name: unix_4.0_annotated_toc_typesetting.png Size:197 KB


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