ABSTRACT
After the explosive penetration of the Internet, every personal computer is now connected to one another over land and sea. The amount of data on the Web has increased every year. The number of computers and servers connected with the Web has increased. The amount of data in a file has also increased because large amounts of data can be handled by the increased execution speed of the central processing unit (CPU). First, only text-based data were used in computers. Then, it became possible to write reports using colorful graphs and pictures. Now, digital still cameras take photographs that are sent to a friend via e-mail and printed by inkjet printers. Short motion pictures can also be viewed on many Web sites.
