A joystick is an input device consisting of a stick that pivots on a base and reports its angle or direction to the device it is controlling. Joysticks are often used to control video games, and usually have one or more push-buttons whose state can also be read by the computer. A popular variation of the joystick used on modern video game consoles is the analog stick.

The joystick has been the principal flight control in the cockpit of many aircraft, particularly military fast jets, where centre stick or side-stick location may be employed (see also Centre stick vs side-stick).

Joysticks are also used for controlling machines such as cranes, trucks, underwater unmanned vehicles and zero turning radius lawn mowers. Miniature finger-operated joysticks have been adopted as input devices for smaller electronic equipment such as mobile phones.

History

[[image:Numbered DE9 Diagram.svg|thumb|right|Computer port view of the Atari standard connector:

1. up
2. down
3. left
4. right
5. reserved
6. fire button
7. +5VDC
8. ground
9. not connected

Joysticks were originally controls for an aircraft's ailerons and elevators.

The name "joystick" is thought to originate with early 20th century French pilot Robert Esnault-Pelterie. There are also competing claims on behalf of fellow pilots Robert Loraine, James Henry Joyce and Mr A.E. George. The latter was a pioneer aviator who with his colleague Mr. Jobling built and flew a biplane at Newcastle, England in 1910. He is alleged to have invented the "George Stick" which became more popularly known as the joystick. The George and Jobling aircraft control column is in the collection of the Discovery Museum in Newcastle Upon Tyne, England. The joystick itself was present in early planes, though the mechanical origins themselves are uncertain.

The first electrical 2-axis joystick was probably invented around 1944 in Germany. The device was developed for targeting the glide bomb Henschel Hs 293 against ship targets. Here, the joystick was used by an operator to steer the missile towards its target. This joystick had on-off switches rather than analogue sensors, i.e. a digital joystick. The signal was transmitted from the joystick to the missile via radio.

This invention was picked up by someone in the team of scientists assembled at the Heeresversuchsanstalt in Peenemünde. Here a part of the team on the German rocket program was developing the Wasserfall missile, a variant of the V-2 rocket, the first ground-to-air missile. The Wasserfall steering equipment converted the electrical signal to radio signals and transmitted these to the missile.

In the 1960's the use of joysticks became widespread in radio-controlled airplane modelling systems such as the Kwik Fly produced by Phill Kraft (1964). Kraft Systems eventually became an important OEM supplier of joysticks to the computer industry and other users. The first use of joysticks outside the RC aircraft industry may have been in the control of powered wheelchairs such as the Permobil (1963). During this time period NASA used joysticks as control devices as part of the Apollo missions. For example, the lunar lander test models were controlled with a joystick.