accept(); 
atoi(); 
bcopy(); 
bind(); 
bzero(); 
close(); 
connect(); 
ctime(); 
difftime(); 
gethostbyname(); 
getsockname(); 
getsockopt(); 
htonl(); 
htons(); 
inet_addr(); 
inet_ntoa();
ioctl();
listen(); 
ntohs(); 
open(); 
read(); 
recv(); 
recvfrom(); 
select(); 
send(); 
select(); 
sendto(); 
shutdown(); 
signal(); 
sleep(); 
socket(); 
stat(); 
usleep(); 
write();