Why computer called an electronic device but not electronic instrument?

It is considered a machine because of the multiple occurrences of independent thinking and learning supplied by the CPU and or the multifunctinal uses of said equation.

A2

It could be argued, the other way around. A computer is a Device rather than a Machine.

A machine implies mechanical devices that move, like levers and gear mechanisms. A computer has no moving parts in itself, discounting the hard drive.

A device, is a generic term for something that can be used.