OpAmp did maths way before microprocessor did. And there's even whole analog computers, some even fully mechanical. https://news.ycombinator.com/item?id=38504

OpAmp did maths way before microprocessor did. And there's even whole analog computers, some even fully mechanical. https://news.ycombinator.com/item?id=38504787 https://news.ycombinator.com/item?id=38504787 I knew my love for steampunk would be useful someday