Where can I find (TUGboat 4 supplement) "TeX and METAFONT: Errata and changes" from 1983?
A copy of the document “TeX and METAFONT: Errata and Changes”, originally distributed as a supplement to TUGboat 4:2 (1983), has been scanned from the possibly only remaining original, and posted with that issue on the TUG website. (The original files no longer exist, or at least cannot be found. The scanned copy is a bit fuzzy, but it's complete -- all 47 pages of it, including an index to the differences between TeX82 and TeX80.)
The link is at the bottom of this page
https://tug.org/TUGboat/Contents/contents4-2.html
As a small bonus, a second document is provided -- a listing of "all errors in the September 1978 TeX user manual that were known on November 4, 1978." This is also a scan -- a two-up printout of an ascii file that once existed on the SAIL computer; a comment at the top of the first page implies strongly that the original files were destroyed after the listing was printed.
update:
The scanned pdf version of the November 1978 document has been joined by a text version. This was produced by first subjecting the scan to an OCR version (thanks, David Carlisle), then reading and correcting as necessary. (The letters "eye" and "ell" and backslashes didn't fare particularly well -- the letters often turned into the digit one, some backslashes also became "one" and others just disappeared. many spaces were dropped at the beginning of lines, and some lines were run in. Some braces and less-than signs turned into parentheses. An occasional "em" turned into "en". Other random glitches weren't consistent enough to make global checking profitable.) I'm not sure that all glitches were caught or corrected, so if anyone has the energy and patience to reread it carefully, please send any reports to [email protected] and corrections will be made as appropriate.
For what it's worth, the additional document that @barbarabeeton provided (at least something very close to it; in fact I think it's more complete even though it is dated earlier than the scan) can be found in its original form here: ERRATA.TXT[TEX,DEK] at the SAILDART archive. If anyone who is interested in the minutiae about early TeX history isn't already aware of this site, it's a goldmine. Some of the earliest material like TEXDR.AFT[TEX,DEK] has been reprinted in Knuth's Computers and Typesetting, but there's so much more. The following files comprise the source code of the last version of TeX written in SAIL before being "released" in its Pascal/WEB form: TEXDVI.SAI, TEXDVI.SAI, TEXEXT.SAI, TEXHDR.SAI, TEXOUT.SAI, TEXPRE.SAI, TEXPRS.SAI, TEXSEM.SAI, TEXSEM.SAI, and TEXSYN.SAI. TEXPRS and TEXDVI are just two of several variant output modules with different "targets".