Connecting to other systems (UUCP) (1C)

`ct`	spawn login to a remote terminal
`cu`	call another UNIX system
`uucp`	UNIX-to-UNIX system copy
`uuencode`	encode a binary file, or decode its ASCII representation
`uuglist`	print the list of service grades that are available on this UNIX system
`uustat`	uucp status inquiry and job control
`uuto`	public UNIX-to-UNIX system file copy
`uux`	UNIX-to-UNIX system command execution