break, brk, sbrk \*- change core allocation
chdir \*- change working directory
chmod \*- change mode of file
chown \*- change owner and group of a file
close  \*-  close a file
creat  \*-  create a new file
csw \*- read console switches
dup \*- duplicate an open file descriptor
exec, execl, execv  \*-  execute a file
exit \*- terminate process
fork  \*-  spawn new process
fstat  \*-  get status of open file
getgid  \*-  get group identifications
getpid  \*-  get process identification
getuid  \*-  get user identifications
gprocs \*- get system process information
gtty  \*-  get typewriter status
indir \*- indirect system call
kill  \*-  send signal to a process
link \*- link to a file
mknod \*- make a directory or a special file
mount \*- mount file system
nice \*- set program priority
open \*- open for reading or writing
pipe \*- create an interprocess channel
profil \*- execution time profile
ptrace  \*-  process trace
read \*- read from file
seek \*- move read/write pointer
setgid \*- set process group ID
setuid \*- set process user ID
sfork \*-  spawn new process immune from terminal interrupts and quits
signal \*- catch or ignore signals
sleep \*- stop execution for interval
stat \*- get file status
stime \*- set time
stty \*- set mode of typewriter
sync \*- update super-block
time \*- get date and time
times \*- get process times
tlimit \*- set process time limit
umount \*- dismount file system
unlink \*- remove directory entry
wait \*- wait for process to terminate
write \*- write on a file
