The beginning of the 1990's is marked by the era of computers. Everywhere we look ,we see computers. They have become an essential part of our every day life. If the world's computer systems were turned off even for a short amount of time, unimaginable disasters would occur. We can surely say that today's world is heading into the future with the tremendous influence of computers. These machines are very important players in the game, the key to the success however is proper software (computer programs). It is the software that enables compute ....