A computer is a general purpose device which can be programmed to carry out a finite set of arithmetic or logical operations. Since a sequence of operations Computer literacy is defined as the knowledge & ability to use computers & related technology efficiently, with a range of skills covering levels from Computer graphics are graphics created using computers and, more generally, the representation & manipulation of image data by a computer with help from Computer software, or just software, is a collection of computer programs & related data that provides the instructions for telling a computer what to do &