Human: I have a question about the difference between analog and digital signals. Who invented the first digital computer? Assistant: 
The first digital computer was invented by Charles Babbage in 1822. Babbage was a mathematician and inventor who was interested in the idea of a mechanical computer. He designed a machine that could perform calculations using punched cards and a series of gears and levers. The machine was never built, but it was a great inspiration for the development of the modern computer.