As you learned above, probably the most important function of computers is their ability to store large amounts of data. The World Wide Web is probably the largest source of information and is available to anyone in the world with a computer and Internet connection. By the end of 2006, there were well over 120 million users connected to some 7 million websites. However, a good portion of information stored on computers is sensitive and critical, and if lost or accessed by the wrong person, could potentially create tremendous personal anxiety and global problems. Hacking, which means gaining access to computer system illegally, is on.