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Re:Ask HN: Why “hello world” and “foo:bar”? by floxy on Wednesday December 14, 2022 @07:43PM (#33993268)
Pretty sure the "Hello, World" got its start from the first program used in "The C Programming Language" by Kernighan and Ritchie, back in 1978. I've always presumed the foo and bar come from FUBAR[0] which seems to have originated in WWII army lingo.

[0] https://en.wiktionary.org/wiki/FUBAR

Re:Ask HN: Why “hello world” and “foo:bar”? by absqueued on Wednesday December 14, 2022 @09:37PM (#33994386)
In that sense, foobar, or fubar literally means "terrible"?
Re:Ask HN: Why “hello world” and “foo:bar”? by l3uwin on Thursday December 15, 2022 @12:31AM (#33995640)
Yes, if it's fucked up beyond all recognition, it's bad.