Computer Hardware – Input Devices and Their Function (Keyboard, Pointing Devices) Computer Hardwares- Input Devices

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Computer Hardware – Input Devices and their function (Keyboard, Pointing Devices)
David Daxon Jr.
College of the Bahamas

Abstract
Any peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or other information appliance. Input devices along with output devices makes up the hardware interface between a computer and a scanner or 6DOF (game) controller. This paper however, identifies input devices and their functions as it results in computing. It also varies the definition and the uses off the two most famous input devices. Moreover, this paper examines Deborah Morley and Charles S. Parker (2009) research in relation to Input Devices and their functions (keyboard, pointing Devices).

Keywords: peripheral, information processing system, 6DOF

Computer Hardware – Input Devices and their function
(Keyboard, Pointing Devices)
Numerous studies have been conducted on various facets on Input Devices, focusing on the different types, their function and their features. In computing, an input device is any peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system such as a computer or other information appliance. However, input devices along with the output devices makes up the hardware interface between a computer and a scanner or a 6DOF controller. Many input devices can be classified according to its modality of input (e.g. audio, visual); the input is discrete or continuous (mouse position, key presses) and the number of degrees of freedom involved.

Keyboard
A 'keyboard' is a human interface device which is represented as a layout of buttons. It is considered as the principal input device and permits to enter text information in the form of the figures or symbols. The keyboard can also be used to type the commands directing the computer to perform certain actions. There are three types of the keyboard, the German, the English and the French that is Qwertzy, Qwerty, Azerty respectively. It contains 120 buttons and it is divided into five parts: numeral part, alphabetic, functional, key control and displacement keys. Each button, or key, can be used to either input a linguistic character to a computer, or to call upon a particular function of the computer. Traditional keyboards use spring-based buttons, though newer variations employ virtual keys, or even projected keyboards. Keyboards are increasingly including alternate input tools such as; touch pads and scroll wheels. Some also include built-in display screens, portable PCs and mobile devices often use (thumbpad, slide-out keyboard pen or touch input, portable keyboard). However, virtual keyboard is an emerging possibility. Figure one illustrates an example of a keyboard.

Point Devices
A pointing device is any human interface device that allows a user to input spatial data to a computer. In the case of mouse and touch screens, this is usually achieved by detecting movement across a physical surface. Analogy devices, such as 3D mouse, joysticks, or pointing sticks; (illustrated in figure 2-4) function by reporting their angle of deflection. Movements of the pointing device are echoed on the screen by movements of the pointer, creating a simple, intuitive way to navigate a computer's GUI. Some devices allow many continuous degrees of freedom as input. These can be used as pointing devices, but are generally used in ways that don't involve pointing to a location in space, such as the control of a camera angle while in 3D applications. These kinds of devices are typically used in CAVEs, where input that registers 6DOF is required. It is sometimes call high-degree of freedom input devices.

Mouse
The mouse is a pointing device which permits to select command and displace the cursor. It is moved on the surface of a desk or on a mouse pad. It is composed of two parts the right...
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