Developed first in 1944, computer is by far one of the best technological developments of all times. Working at high speeds, computers have changed the way we live. They have become an indispensable part of our lives and are inbuilt in almost all spheres of day to day living. Whether it is banking or traveling, shopping or finding information, computers can be seen everywhere. The computers themselves have undergone quite many changes and have become smaller, portable and much faster.