AIX 5.3: Start Service on System startup

Hi,
I'm new to AIX, and have to make some services start at system startup. The IBM-Redbook says I have to edit /etc/inittab. As a long time (Debian)-Linux Admin I'm a bit confused. Is there something like /etc/init.d/$SERVICE in AIX?

Greetings,

Dennis

Sure there is, thats the way we start Oracle everytime the system boots

$ who -r #to check the runlevel
$ ls -l /etc/rc.d/ #and put there your scripts with appropriate prefix Sxx/Kxx...