Whats is a computer system, computer history, desktop computer and types of computer definition

 What is a Computer

   A computer is a general purpose machine, commonly consisting of digital circuitry, that accepts (inputs), stores, manipulates, and generates ( outputs)data as numbers, text graphics, voice, videos files, or electrical signals, in accordance with instructions called a program. 

The major characteristics of a computer are high speed, accuracy, diligence, versatility and storage.