Job Control (cont)

Jobs can exist in different states

Running in foreground 
The program is running, and until it's done you won't get a prompt back.

Running in background
The program is running, but you can continue what you were doing.  It's output will shoot across your screen, which may annoy you.

Stopped 
The program is halted wherever it was stopped.

Stopped, waiting for input
The program is in the background and needs you to to put it in the foreground and give it input before it can continue doing anything.