HP 9000 200 Series Manual page 94

PERMISSION specifies who has access rights to the file:
R
indicates that the file can be read;
W
indicates that the file can be written;
X
indicates that the file can be searched
(meaningful for hierarchical directories only).
There are 3 classes of user permissions for each file:
OWNER (left-most 3 characters);
GROUP (center 3
character~);
OTHER (right-most 3 characters).
See the subsequent section called "HFS File and Directory Permissions"
for further information).
OWNER specifies the owner identifier for the file (for BASIC files, the default
owner identifier is always 18).
GROUP specifies the group identifier of the file or directory (for BASIC, the
default group identifier is always 9, which is used for "workstations"
such as Series 200/300 BASIC and Pascal).
5-16 U sing Directories and Files