> Analog computers like this are virtually useless unless you have some particularly applied use-case for them. Did you miss the educational part? Electronics

> Analog computers like this are virtually useless unless you have some particularly applied use-case for them. Did you miss the educational part? Electronics is physical math. Amplifiers are a perfect example, take an input and multiply it. Resistors can be used to subtract or divide. Combining these functions is how an op-amp works. Combining more components now allows you to do integrals, derivation, and other functions. From there you take these basic building blocks and apply them to real world problems like audio amplification, processing and filtering. Of course a lot of this is replaced by digital stuff but digital has one huge disadvantage: obsolescence. I can repair a 40 year old analog amplifier. I cant repair a 10 year old stereo with a dead ASIC or DSP/SoC.