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Enter Digital Computers
A digital computer is a type of computer which receives and computes data converted into binary form (that is 1s and 0s) The main difference between analog and digital computers is how they handle and process data. A digital computer functions by receiving amnd computing data converted into binary form (0 and 1) while Analog computers function continuously, no matter what the variations are in the input i.e temperature, current.
Lesson 3 PowerPoint
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Additional Reading
https://en.wikipedia.org/wiki/Analog-to-digital_timeline