Comment on Why do regexes use `$` and `^` as line anchors?Comments−Lex-20082yNot sure about $ sign, but ^ probably comes from ADM-3A: https://en.wikipedia.org/wiki/ADM-3A#LegacyAnd here is a photo of its keyboard: https://twitter.com/toresbe/status/1756800589340549609/photo...−em5002yPer the article, these anchors appear in Ken Thompson's port of the QED text editor which dates back to 1970, years before even the ADM-1 terminal.
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Not sure about $ sign, but ^ probably comes from ADM-3A: https://en.wikipedia.org/wiki/ADM-3A#Legacy
And here is a photo of its keyboard: https://twitter.com/toresbe/status/1756800589340549609/photo...
Per the article, these anchors appear in Ken Thompson's port of the QED text editor which dates back to 1970, years before even the ADM-1 terminal.