What are the different states of a process?

The main process states are: New (process being created), Ready (waiting to be assigned to CPU), Running (currently executing on CPU), Waiting/Blocked (waiting for I/O or event), Terminated (finished execution). Transitions: New to Ready (admitted), Ready to Running (scheduler dispatch), Running to Ready (interrupt/preemption), Running to Waiting (I/O request), Waiting to Ready (I/O complete), Running to Terminated (exit).