sgmls(1) on Linux
The text 0b24c540d076, as Debian 1.2 (Rex), Debian 1.1 (Buzz) shipped it. The page shows this text now.
a validating SGML parser An SGML System Conforming to International Standard ISO 8879 — Standard Generalized Markup Language
Flags it lists
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-c -
-d -
-data -
-e -
-g -
-i -
-l -
-p -
-r -
-s -
-u -
-v