A computer's processor and programming enables it to emulate human activities in mathematics, word processing, and data storage and retrieval. It can do calculations and searches so quickly because it can use simple steps repeatedly at incredible speed. This makes computers fast, accurate, and generally reliable. - Data stored as digital files takes up an increasingly smaller amount of physical space, enabling ever-increasing volumes of information to be saved and used. - The transfer of information and correspondence, trivial or vital, can be accomplished swiftly over large distances at a tiny fraction of the cost of paper documents.- The internet makes available a vast collection of information from many varied sources, much of which was nearly unobtainable until the advent of computer-based communication.