Which came first? I am pretty sure it was computer accounting systems. Which is ... | Hacker News

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		buescher on May 18, 2022 \| parent \| context \| favorite \| on: Billing systems are a nightmare for engineers Which came first? I am pretty sure it was computer accounting systems. Which is older, the oldest continuously supported operating system, or the oldest continuously supported (computer) accounting system?

eesmith on May 18, 2022 [–]

The oldest computer accounting system was likely LEO - https://en.wikipedia.org/wiki/LEO_(computer), online in 1951 and doing accounts probably by 1955, if not earlier.

I believe it predate operating systems by a few years. (Wikipedia claims the first OS was the GM-NAA I/O, produced in 1956.)

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