The Great 202 Jailbreak - Computerphile

Computerphile with Professor David Brailsford on how a 1970s Bell Labs memo was recovered from a Linotron 202 phototypesetter. The story involves reverse engineering the machine's typesetting codes and files.

HN people offer it as an excellent side trip whenever phototypesetters, early Unix or Bell Labs documents come up.

“Here is Brailsford’s Computerphile video describing how the memo was reconstructed”