"Proposed Standard 6-Track Tape Code", a table of characters with six-bit encodings.

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   Lars Brinkhoff (larsbrinkhoff@mastodon.sdf.org)'s status on Friday, 25-Apr-2025 21:11:30 JST Lars Brinkhoff

   This 1961 proposed standard for punched tape has a lozenge ◊ as the printed representation for an ESCAPE code. Around 10 years later, the Stanford and MIT AI labs adopted this glyph for their extended ASCII character set.