a) High speed: As a computer is an electronic machine, it does calculation at a very fast rate. Computer can even perform difficult calculations speedily than a human being. A computer works on low or high signal of electricity. These two different states of electric signals are represented in a computer by using binary number system. The circuitry of a computer is designed in such a way that electrical signals travel at speed of light, so the processing speed of a computer is high. Computer can process millions of data with in a fraction of second. The speed of a computer is measured in terms of MIPS (Million Instructions per Second).
f) Automatic: A computer carries out the instructions or operations automatically till it is completed, as it is programmed to do so. Once you have fed instructions to the computer you don’t need to instruct it again and again. It can perform the tasks automatically as instructed by a program.
g) Reliability: A computer does not have any moving parts, so its parts do not wear and tear out. Thus a computer lasts long.