The flags are displayed as letters following an object's ID number. Flags are set with the @set command. The flags are:

A Abode
B Builder (or Bound)
C Chown_OK
D Dark (or Debug)
E Exit
F A MUCK Forth program
H Haven
J Jump_OK
K Kill_OK
L Link_OK
M# Mucker level. #=1-3 (Priority Level for exits.)
P Player
Q Quell
R Room
S Sticky (or Silent)
V Vehicle
W Wizard
Z Zombie

See TYPES, GENDER, and individual flag names.