Input Devices of Computer List
Input Devices of Computer List
There a lot of devices that are attached to computer some of them are input devices while other are output devices these devices are collectively referred to as peripheral devices. Input Devices of Computer List is as below:
Input devices
Information or data that is entered into a computer is called input devices it can come from a external source and be fed into a computer software it is done b an input devices in other words devices that are used to give instruction to the computer are known as input devices they send information into the CPU without any input device that computer would simply be a display device like a TV.
Some most commonly used input devices are given below
- Keyboard
- Mouse
- Trackball
- Scanner
- Joystick
- Web cam
- Microphone
- Bar code reader
- Optical character recognition
- Magnetic ink character reader
- Optical mark reader ]
- Kimball tag reader
- Speech recognition system
- Light pen
- Touch screen
Keyboard
The keyboard is one of the main input devices used in a computer it is used to enter text and numeric data in a computer system its looks very similar to typewriters with some additional keys like function keys the Ctrl keys and alt keys a standard keyboard has 104 keys a port is built for adding the keyboard nowadays USB keyboard is also available which is added into USB port of computer system and wireless keyboard which has no need to add into computer system.
It is an input device that was invented by Douglas of the Stanford research institute in 1963. It is also called pointing device which is used to point to the things on the monitor screen. There are three types of mouse. Two button mouse three button mouse and optical mouse. A two button mouse has right and left button , a three button mouse has right left and center buttons and optical mouse has right, left button and a scroll wheal at the center. When we turn the mouse upside down we see a ball under it. This mouse ball helps to move the mouse in a plane surface. The movement of the ball is reflected by the movement of the mouse pointer on the monitor. A mouse pointer takes different shapes depending on the task we are performing. The mouse is placed on a slate shaped object which is called mouse pad. There are four mouse action : click , double click , right click and drag and drop.
Track ball – A track ball is an alternative to a mouse. It has a ball rotated by the hand to move the pointer in a desired direction. It is mainly used in the pointer CAD , CAM and medical field.
1. Joystick
A joystick is an input device which helps in playing computer but it has stick in the placed of ball and video games. It also works as a Trackball.
1 Scanner
a scanner is used to convert a text or an image into its electronic or digital representation, which can be viewed on the screen. These scanned or digital images can be used in different fields. They can be processed edited and stored in memory or in any storage device. It looks like a photocopy machine. A sales clerk at a checkout counter scanning a tag on an item rather than keying it into the system is using source data automation process by scanning. Digital photos and scanned images are typically stored as bitmap graphics with extension such as .bump .png. jpg. Tif. Or gif.
1. Microphone
A microphone is used to record any voice or sound into the computer.
1. Web camera
A web camera is used to view images on the internet. Using it with the help of internet we can view the photo of a far away person, but he should also have a web camera. It is like an input device by adding to the computer. It captures images in digital format that can be easily transferred into a computer and manipulated using graphics software. A web cam is a video capture device connected to a computer, often using a USB port or, if connected to a network Ethernet or wifi.
1. Bar code reader
A bar code reader is an electronic device for reading information contained in a printed bar code. It is also called a point of sale and scanner. Today supermarkets commonly use bar code data for pricing and inventory updating. The black and white lines or bars of varying widths or length that we see on a grocery item at supermarket are bar code and read by bar code reader. The bar code reader translates black and white bars of different widths into electronic impulses and sends them to the computer. Now a days it is used in supermarkets, libraries and bank.
