The microcomputer really hit off in the 1970s+ when the more powerful microprocessors arrived on the scene. A microcomputer is a computer that depends on a microprocessor. They are designed for personal uses in different forms like personal computer to notebooks, the microcomputer contains a central processing unit that is on top of the microprocessor, ram (Random access memory) and rom (read only memory) also has bus systems, I/O and is more than likely to all be attached to a motherboard. However the term micro was big in the 1970s and 80s but now it has fallen out of common use. To give you an example of a micro-computer the commodore 64 was the best of its era and one of the bestselling models of home computers of all time.