Science has been a part of our day-to-day life. It developed along with the progress of man. In other words, life of man progressed along with the development of science. Our imaginations were behind every scientific invention. Inventions in different fields will go on for the benefit of mankind. During the last five decades science has taken a giant stride. 25-30 years ago no one would have believed of a device as small as a match box can be used as phone, camera, internet browser, music recorder, music player, video player, video camera, calculator and a lot more - all rolled into one.