From LQWiki

The Unix-to-Unix Copy Protocol (UUCP) enables file transfer over a direct serial connection, via modem or other connections. It has mostly been superseded by newer services including FTP, HTTP, SFTP and NNTP. UUCP originally formed the basis for Usenet.

• UUCP Project Home Page (www.uucp.org)
• UUCP on Linux HOWTO, from the Linux Documentation Project (www.tldp.org)
• UUCP Internals FAQ (www.faqs.org)
• Wikipedia entry (en.wikipedia.org)
• Linux UUCP and sendmail (www.psg.com)
• Setting up UUCP over SSH (www.internatif.org)
• Manpage
• FOLDOC entry (foldoc.doc.ic.ac.uk)