« ihnp4 Email History Page - Gary J. Murakami », sur www.nobell.org (consulté le ) : « Early UNIX mail at Bell Laboratories 1979 mail UNIX V7, Bell Laboratories, Murray Hill, NJ uucp - UNIX to UNIX copy »
(en) D. A. Nowitz, « Uucp Implementation Description » [archive du ], (consulté le ) : « 1. Uucp - UNIX to UNIX File Copy The uucp command is the user’s primary interface with the system. The uucp command was designed
to look like cp to the user. The syntax is uucp [ option ] ... source ... destination », p. 1
(en) D. A. Nowitz, « Uucp Implementation Description » [archive du ], (consulté le ) : « 1. Uucp - UNIX to UNIX File Copy The uucp command is the user’s primary interface with the system. The uucp command was designed
to look like cp to the user. The syntax is uucp [ option ] ... source ... destination », p. 1