Once logged in you get ftp service - you can transfer files from that computer to your desktop computer. Anonymous ftp servers contain ShareWare software, some of it is free, some you are obliged to pay for. These computers offer a wide variety of services, determined by the system manager. You can use some anonymous telnet sites from MSU's Gopher system. You view, point, click, listen, read and type.
Web supports graphics, sound, and text.
Your computer gets the information from web servers around the Internet.