Question

micro computers are cheap and easy to use​

Answer 1

As microprocessors and semiconductor memory became less expensive, microcomputers grew cheaper and easier to use. Large cheap arrays of silicon logic gates in the form of read-only memory and EPROMs allowed utility programs and self-booting kernels to be stored within microcomputers.

Answer 2

Assuming a network of small microcomputers with interfaces for applications and a larger one for program development, 6502-based hobbyist computers appear cheapest at this time. ... Prices range from a few hundred dollars for a minimal system to several thousand for a microcomputer suitable for program development.