4. FTP (File Transfer Protocol)..this is both program and the method use to transfer files between computers. It is an option that allows users to transfer files from thousands of host computers on the Internet to their personal computer account.
5. E-MAIL DISCUSSION GROUPS… offers people world wide to communicate via e-mail, because INTERNET is home to a large community of individuals who carry out active discussions organized around topic oriented forums distributed by e-mail.
URL (Uniform Resource Locator- specifies the Internet address of a file stored on a host computer connected to the Internet. URL are translated into numeric addresses using the DNS (Internet Domain Name System)