If a computer is a machine that helps me compute, then I'd argue an electronic calculator fits the definition regardless of the century: https://en.wiktionary.

If a computer is a machine that helps me compute, then I'd argue an electronic calculator fits the definition regardless of the century: https://en.wiktionary.org/wiki/compute https://en.wiktionary.org/wiki/compute I'd be inclined, though, to exclude "non machine" counting tools such as an abacus.