File exchanges between local and remote systems
The transfer of files among systems is the most common application of the Basic Networking Utilities (BNU). BNU uses four commands, uucp, uusend, uuto, and uupick, to exchange files between local and remote systems.
The uucp command is the primary BNU-data transfer utility. The uusend command is the Berkeley Software Distribution (BSD) transfer command incorporated into BNU. The uuto and uupick commands are specialized send and receive commands working with the uucp command.
The BNU commands, uuencode and uudecode, assist file transferring. These commands encode and decode binary files transmitted through the BNU mail facility.