There are two main characteristics of a computer: (i) It responds to a particular set of instructions in a well-defined format. (ii) It may execute a pre-recorded list of instructions or a program. Modern computers are electronic or digital. The actual machinery such as transistors, wires and circuits is known as hardware and the instructions or data are known as software. https://www.expertsmind.com/computer-science/anatomy-of-digital-computer-assignment-help.aspx