Internet Relay Chat. Summary of commands. Go up one directory level. Get the file. Note this is for the DOS version, it may be easier to use the Windows version.
Gopher is basically a menu-driven file retrieval system.
One problem is actually finding a specific item on the Net. WWW also has links to telnet, ftp, Archie, Gopher, Veronica, WAIS etc. This is the network address and filename for the WWW document. HTTP Hypertext Transfer Protocol. This is just the protocol defining how the information is transferred across the network.