[Q] TFM files headers

[Taylor, P]

Donald Arseneau wrote:

*\catcode `A=\catcode`\~
*\font A=cmr10
*A
* Hello.\par
*\tracingall\showlists

So there are idiosyncrasies with plain-letter named fonts.

I don't think that one was required to re-catcode (e.g.,) "A" in those days, Donald, in order to use it as a font identifier.  See (for example) http://www.tug.org/TUGboat/tb02-1/tb02mill.pdf

Philip Taylor
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