The Internet is the largest network in the world. It is a network of networks and access to it is unrestricted. A mailing list is similar to a bulletin board, the main difference being that every subscriber receives the postings as email messages rather than reading them on a bulletin board. Microsoft Internet Explorer is one of the more popular browsers. A modem is a device that enables data to be sent over telephone lines.
Most users connect to the Internet by modem.
Multimedia indicates the incorporation of sound, animation and video as well as text and graphics in a document or application. Netscape Navigator is currently the most popular browser. Newsgroup is the name often used for the bulletin boards on the Internet. The NHSweb is the NHSnet's equivalent to the Internet's world-wide Web. An online service is a network which users can access at any time.