ac \*- login accounting
bcheck \*- find missing blocks in filesystems
boot procedures \*- UNIX startup
chgrp \*- change group
chown \*- change owner
clri \*- clear i-node
crash \*- what to do when the system crashes
cron \*- clock daemon
dcheck \*- file system directory consistency check
df \*- disk free
dpd \*- data phone daemon
dump \*- incremental file system dump
getty  \*- set typewriter mode
glob \*- generate command arguments
icheck \*- file system storage consistency check
init  \*-  process control initialization
ipatch \*- first aid for sick file systems
lpd \*- line printer daemon
mkfs \*- construct a file system
mknod \*- build special file
mod \*- modify documentation database.
mount \*- mount file system
ncheck  \*-  generate names from i-numbers
restor \*- incremental file system restore
sa \*- Shell accounting
slp \*- set printer characteristics
su  \*-  become privileged user
sync \*- update the super block
umount \*- dismount file system
update \*- periodically update the super block
wall  \*-  write to all users
