A computer is a programmable electronic machine that stores, retrieves, and manipulates or processes data. It cannot think or reason; it can only carry out instructions given to it. A set of instructions that directs its actions is called a program. The instructions of a program generally direct the computer to perform three basic functions over and over again; these functions are input, processing, and output. Collectively, these functions constitute the data processing cycle.
The computer reads a program and stores it in the memory. The computer executes program instructions to:
>>> Input data from the disk, the keyboard, or other media
>>> Process the data and
>>> Output results to the display screen, disk or other storage media.
0 Comments