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Input devices used to lớn control a pointer on the screen are known as pointing devices. A pointer is a small symbol that appears on the screen in the graphical user interface

Types of pointing devices

There are different types of pointing devices.

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Mouse

The mouse is a popular pointing device. It is used to lớn enter instructions with a pointer on the screen Mouse is moved on a flat surface to lớn control the movement of the cursor or pointer on the screen.

 A mouse generally has two or three buttons. These buttons are used to lớn perform different tasks such as selecting an object or opening a program etc. It may also include a wheel to lớn scroll through long documents.

Types of Mouse

Different types of the mouse are as follows

Mechanical Mouse

A mechanical mouse has a rubber or metal ball inside it to lớn move the cursor. The cursor movement depends on the movement of the ball. This mouse is generally used on the mouse pad. A mouse pad is a small pad of rubber or foam to lớn supply easy movement of the mouse. It secures the mouse from dust and dirt.

Optical Mouse

The optical mouse contains no ball inside it. It uses a device that emits light to lớn detect the mouse movement. An optical sensor or laser is used in these types of mice. It is more expensive than thở a mechanical mouse Optical mouse is becoming popular nowadays.

Wireless/Cordless Mouse

The wireless or cordless mouse is a type of mouse that does not need a wire to lớn perform its functions. It transmits data through wireless technology lượt thích radio waves or infrared light waves.

Air Mouse

The Air mouse is a motion-sensing mouse. It can be used to lớn control objects, truyền thông media players, and slide shows by moving the mouse in specific directions through the air.

For example, the user can raise the mouse to lớn up the volume of the different truyền thông media players. The air mouse works in the air by detecting hand motion.

Trackball

A trackball can be used in the place of a mouse to lớn perform cursor movement. This device has buttons similar to lớn the buttons on the mouse. It has a large rotating ball on the top, which is used to lớn move the cursor.

The body toàn thân of the trackball does not move, the ball on the mouse is rolled by figures. The position of the cursor on the screen is controlled by rotating the ball.

An advantage of the trackball is that it takes less space to lớn move than thở a mouse Trackball is often included in máy tính xách tay computers. It can also be used as a separate input device with standard desktop computers.

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Touchpad/ Trackpad

A touchpad is a small, flat surface on which the user moves his finger. To move the cursor we use the finger. It is also known as a trackpad. A touchpad also has one or more buttons near it. These buttons work lượt thích mouse buttons. Touchpads are commonly used in notebook computers

Pointing Stick

A pointing stick is a pressure-sensitive device. It is similar to lớn a pencil eraser and exists between keys on the keyboard. The pointer on the screen moves when the user presses the pointing stick. It requires no additional space or cleaning lượt thích a mouse. A pointing stick is normally used in notebook computers.

Touch Screen

A touch screen is a đoạn phim display screen that accepts input from the touch of a finger. There is a covering of plastic over the screen. Behind the screen, there are infrared light beams that are invisible. By touching thực đơn items or symbols on the screen, the user enters data. The touch screen is very easy to lớn use most touch screen computers use sensors to lớn detect a touch of a finger.

The touch screen is well suited for simple applications lượt thích ATMs It has also become common in department-stored supermarkets.

 Light Pen

A light pen is a hand-held device. It has a light-sensitive stylus. It is connected through a wire to lớn the computer. It has a device at the tip that emits light. The pen sends information to lớn the computer when the user touches the pen on certain areas of a specially designed screen Light pen is usually used by engineers and graphic designers etc.

Joystick

A joystick consists of a base and a stick that moves in different directions to lớn move the cursor. The stick can be moved in a different direction to lớn move an object around the screen. A joystick can perform a similar function to lớn a mouse or trackball. It is often considered less comfortable and efficient.

The most common use of a joystick is for playing computer games. Some of the latest joysticks such as Logitech Freedom 2.4 are wireless.

Digital Pen

A digital pen is larger than thở a stylus. It is available in two forms. Some digital pens are pressure sensitive and some use a tiny built-in digital camera. A pressure-sensitive digital pen is used in TabletPC.

The pen input is normally used with a touch screen. If a touch screen is not accessible, a graphic tablet is utilized in conjunction with the computer. A graphics tablet is made up of a flat pad (the tablet) on which the user can draw using a stylus, a unique pen.

As the user draws on the pad, the image is generated on the screen. Using a graphics tablet, a designer can create drawings that are both incredibly useful and beautiful.

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 Gamepad

A gamepad is a pointing device that controls the movement and actions of players or objects in games. It is a multifunction input device that includes programmable buttons, thumbsticks, and a directional pad. The user can program the buttons to lớn correspond to lớn certain actions such as changing a weapon, opening a door, etc. The directional pad and thumb sticks control the movement.

Gaming Wheel

A gaming wheel is an input device that uses a steering wheel and a separate mix of foot pedals to lớn imitate real-world driving. Most gaming Wheels incorporate programmable

The control pad on an audio player is used to lớn scroll through music, adjust volume and customize settings.