A microprocessor is made for a

A microprocessor is designed chiefly as the central processing unit of a computer.

A digital system is a broad category, not the specific device it is built for.

A calculator uses only a small fixed processor, far simpler than a microprocessor.

Electronic goods is too general to name what the chip is made for.

It fetches, decodes and executes instructions on a single integrated chip.

The first commercial microprocessor was the Intel 4004 in 1971.