local area network , internet,and world wide web?

LAN - The electronic linking, by cable or infrared beams, of several or all computer workstations within a specific physical area to a file server or storage and processing device. It allows all users connected to the network to access the server's software and data files and to exchange electronic messages via an electronic mail system. Frequently includes printers, scanners, and other related equipment.

World Wide Web - The World Wide Web is a part of the Internet designed to allow easier navigation of the network through the use of graphical user interfaces and hypertext links between different addresses.

Internet - A global system of linked computer networks that allows data communication services such as remote log in, file transfer, electronic mail, bulletin boards and news groups. The Internet is also the foundation for the World Wide Web (WWW).