If you own a Pan-Tilt-Zoom or PTZ Camera, you may need a PTZ camera controller.  This is the device that is used to move the camera; left and right for panning, up and down for tilting, and enlarge and reduce for zooming.  Some cameras don’t require a separate controller and others even accept multiple user input as if the controllers are on a network.

PTZ camera controllers normally have keyboard type buttons and a joystick which can be used to control the PTZ camera.  Depending on the features and manufacturer of the PTZ camera, it may not even be necessary to have a PTZ camera controller as the camera can be controlled using other methods.