Just to clarify this section: If multiple processes can be unblocked at any time, they are unblocked (added to the READY queue) in the same order that they requested their action. so if two processes where sleeping, pid0 and pid1, and pid0 called sleep() before pid1 did, but pid0 sleeps for 5000usecs while pid1 sleeps for 10usecs, would pid0 be unblocked before pid1 because it requested sleep() before pid1 did?