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Personal Computer
http://ids.si.edu/ids/deliveryService?id=NMAH-91-14186&;max=1000

One board micro computer / Single board micro computer
https://upload.wikimedia.org/wikipedia/commons/thumb/a/a4/TK-80.jpg/1920px-TK-80.jpg

Micro processor
https://upload.wikimedia.org/wikipedia/commons/thumb/5/52/Intel_4004.jpg/250px-Intel_4004.jpg