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The original was posted on /r/todayilearned by /u/Sandstorm400 on 2023-08-10 19:10:58.

Original Title: TIL that in 2015, 19 Michigan schools’ heating and air conditioning systems were controlled by a 1980’s Amiga computer that was programmed 30 years prior by a high school student. The former student was still being called upon to repair it if something went wrong.