The computer is derived from a Latin word "computare" which means "to calculate", "to count", "to sum up" or " to think together".
Therefore, the word computer more precisely means a "device that performs computation".
A computer is a programmed device with a set of instructions to perform specific tasks and generate results at a very high speed.
The first digital computers were developed between 1940 and 1945. Konrad Zuse, in 1941 developed "Z3", the first modern computing machine. He is regarded as "the inventor of the computers".
ENIAC (Electronic Numerical Integrator and Computer) was the first US-built electronic computer. It was developed by John Mauchly and J. Presper Eckert.
In 1981, IBM PC with Intel Processors and MS-DOS were introduced.