No, the wait syscall doesn't automatically have to be added after a spawn syscall. Although if you want it to actually wait, then you'd have to do it after a spawn, otherwise it wouldn't have any children. Well it doesn't really say much in the project about what you should do, although it does have this in the old clarifications: create the new (child) process append the new process to the READY queue (NEW→READY) append the current (parent) process to the READY queue (RUNNING→READY) So hopefully that helps