Someone

root::0:root
bin::1:root,bin,daemon
daemon::2:root,bin,daemon
sys::3:root,bin
adm::4:root,daemon
tty::5:
disk::6:root
lp::7:daemon
mem::8:
kmem::9:
wheel::10:root
ftp::11:
mail::12:
log::19:root
smmsp::25:
games::50:
network:x:90:
video:x:91:
audio::92:raph
optical::93:hal
floppy:x:94:hal
storage:x:95:hal
power:x:98:
nobody::99:
users::100:
slocate:x:21:
dbus:x:81:
hal:x:82:
avahi:x:84: