uuglist prints the list of service grades that are available on the system to use with the -g option of uucp(1C) and uux(1C).
-u List the names of the service grades that the user is allowed to use with the -g option of the uucp and uux commands.
/etc/uucp/Grades contains the list of service grades
See attributes(5) for descriptions of the following attributes:
|ATTRIBUTE TYPE||ATTRIBUTE VALUE|
uucp(1C), uux(1C), attributes(5)