Unix groups allow an organization to securely share information
by granting file access to a group rather than a single individual.
Each file still has an "owner" but that person can determine what
group has access to the file and what type of persmissions they
should have. For example, you may want to give someone permission
to read a file, but not to modify it.
To find out what groups you currently belong to, log in to
UBUnix and at the prompt enter the command groups.