AT&T Unix Owner's Manual page 178

Using Office Commands
Note
If you don't have any applications sup-
porting group access, group access
functions the same as public access.
Write permissions:
You can use this field to determine
if the contents of your files can be edited and if a
user can add or delete files from your folders. This
is useful to prevent unauthorized users from changing
important data. The three types of access for write
permissions are:
3-92
o Write-protected--No user, including the
owner, can edit the file or create or copy
files into the folders. However, the owner
can still delete the file or folder.
o Private--Only the owner of the file or folder
can make changes to its contents. If its
read permission is public, other users can
modify this file by copying i t first. Then
the other user becomes the owner of the
copied file.
o Public--AII users of your UNIX PC system can
make changes to the file or folder.
o
~--AII
users of a group you have set up
can open and view the contents of the file or
folder and copy its contents. Groups can be
created only if you have installed certain
applications that support group access.
Note
If you don't have any applications sup-
porting group access, group access
functions the same as public access.