A computer actually is an electronic device capable of interpreting and executing programmed commands for input, processing, output and even the logical operations. And I would like to introduce the evolution of computer, and then talk about the generations of it.
During the ancient period, "Abacus" was probably the original mechanical counting device, and its effectiveness has withstood the test of time. Undoubtedly, it is still used to illustrate the principles of counting. Once again, that means the preceding of the computer is the mechanical device.
Blaise Pascal (1623-62) who was a Fr…
