I have a belief that computers were analogical would be much better, because the human being communicates analogically than the man machine interaction would naturally be easy.
You can build using our precision and high-speed OP_AMPs
Analog computer - Wikipedia, the free encyclopedia
Analog Computer Museum - Homebrew Equipment
Interesting! I'm old enough to remember using several analog computers in school. One was a simple two-integrator unit made by AMF for a wonderful Engineering Concepts course in high school. The other was a TR-20 in college. And sorry for this heresy: You can also play with a "digital analog computer" using Analog Devices' SigmaStudio and one of the Sigma DSPs:
An Integrator Block for SigmaDSP
Retrieving data ...