On pipe organs each manual plays a specific subset of the organ's stops, and electric organs (e.g., Hammond organ) and electronic organs can emulate this style of play. Hammond organs differ from pipe organs in that pipe organs can only pull a stop out (that is, turn on a stop) or push it in (turning off this stop); in contrast, Hammond organs typically have drawbars, so that the player can control how much of each "pipe rank" (e.g., 16', 8', 4', 2', etc.) they wish to use. Synthesizers can program separate manuals to emulate sounds of various orchestral sections or instruments, using imitative digital sounds or sampling of real instruments, or using entirely synthesized sounds. On digital synthesizer instruments a performer can produce the sounds of an entire orchestra through the use of all available manuals in conjunction with the pedalboard and the various registration controls.