What are The Input Devices of Computer System

The Input devices of computer systems are electromagnetic devices that acknowledge information and accept data or set of instruction from outside the world and translate this data into machine meaningful and readable form.

Computer Input devices act as a medium of communication and correspondence between computers and the outside world.

With the help and assistance of these input devices users can enter the data, and later the data can be stored in computer memory for further additional processing and preparation.

After the processing and handling are finished the desired and converted outcome can be obtained with the help and assistance of output devices of computers.

The computer keyboard and mouse are the general examples of input devices of computer system, there are several more devices which are used for input, with the use of these devices user is able to enter text, images, audio etc.

Input Devices of Computer
10 input devices of computer and their uses

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10 Different Types of Input Devices of Computer System

There are 10 Different Types of Input Devices of Computer that can be further categorized. A list of these peripherals devices are mentioned below::

  • Keyboard
  • Mouse
  • Scanner
  • Trackball
  • Joystick
  • Light Pen
  • Touch Screens
  • Optical Card Reader (OCR)
  • Magnetic Ink Character Recognition (MICR)
  • Optical Bar Code Reader (OBR)
  • Voice Recognition Devices
  • Optical Mark Reader (OMR)


Keyboards are generally used for entering data into the computer system. This is the most used and famous input device in the computer world.

Mainly Three types of keyboards are available in the market::

  • PS2 Keyboard
  • USB Keyboard
  • Wireless Keyboard
keyboard-Input Device of computer
keyboard-Input Device of computer

The Personal Computer’s keyboard looks similar to the old typewriters but there are various keys to perform different tasks such as there are numeric keys to enter numeric values, alphabetic keys for entering characters, special keys for entering special symbols such as #,$,@, etc, multimedia keys for audio and video players.

The standard keyboard has 101 keys but with the continuous development of computer technology, we can purchase a keyboard with 102 till 124 keys.

In this modern era, keyboards can be purchased which have special features and are capable to type in other languages.

Functions keys

These are the keys that are named F1 to F12.

This can be found at the top of every keyboard, these keys are for special use, their uses can defer from one software to another which entirely depends upon the software developer or programmer.

For example, the F1 key (Help key) is used to find help on any given topic, In windows, these keys are used commonly for getting some extra information or just to describe the topic further.

Alt+F4 these combination keys are used for closing any application or program which is actively running on the computer system.

F2 is used for renaming any file or folder. Functions keys are best used when they are combined with any other keys defined for specific purposes.

Alphanumeric Keys:: These keys have digits that range from 0 to 9, and when they are used by pressing SHIFT users can type special keys such as @ # $ % & *, etc.

This section is used while typing text with digits and special symbols, users can also type in Capitals when the CAPS LOCK key is on.

Numeric Keypad:: Numeric keypad allows users to enter numeric values from 0 to 9 when NUMLOCK is ON. This is used when the user has to rapidly enter numeric values for calculations.

If NUMLOCK is off the numeric pad is not active.

Arrow keys:: There are four keys which point us with direction Up-Down Right –Left, These keys are used for moving the cursor in any said four directions.

CAPSLOCK:: When the caps lock key is ON user can type the text in capitals. When the key is off user can type the text in a small case.

SHIFT:: Shift key when pressed user can type with capital letters and also special characters such as @ # $ % ^ & can be typed while the key is pressed.

CTRL:: CTRL key is used as a combination key. CTRL+C is used for copying any documents or folders.

CTRL +V is used to paste the document to any other location. CTRL+S is used for saving the document in almost every software or application.

ALT:: ALT key can be used as a combination with F4. When ALT+ F4 pressed it closes the active program or application running on the computer. There are 2 ALT keys on the keyboard that are used for the same purpose.

SPACEBAR:: The space bar is used to insert space between two words or sentences.

ENTER:: In many software or application, this key is used to tell the application to execute the instructions. In MS –Word it is used for entering a paragraph.

BACKSPACE:: Generally backspace is used to delete the last character of the text in many applications such as ms-word, it is also used to move the cursor to 1 position to the left.

DEL:: Delete key is used to delete any file or folder or document when selected.

HOME:: When the HOME key pressed it sends the cursors to the beginning of the page.

END:: It is used to move the cursor to the end of the line.

PAGE UP:: Used to Display previous page on the screen. For example in a PowerPoint presentation PAGE UP key is used to toggle between the presentation.

PAGE DOWN:: used to display next page on the screen.

ESC:: In many applications, this ESCAPE key is used to terminate the program or cancel any running command.

PAUSE | BREAK:: This keyboard key is used for pausing any action performing on the monitor screen.

PrintScreen:: This key is used for taking pictures of any content whether it be a text or image and later with modification it can be provided for printers for outputs.

WINDOWS KEY:: This key is used for displaying the start menu.

MENU KEY:: Menu key is used for Right-click inside almost all applications.

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Input Devices of Computer
Input Devices of Computer system

MOUSE:: MOUSE is a pointing device, the pointing device is the interface where users have an extra edge over the keyboard where they can point to a certain position on the screen, click and drag icons files and folders from one place to another.

The mouse is a famous and most used input device commonly it has 2 buttons one on the right-side second the left side of the mouse. In between the 2 buttons, there is a wheel that is used for scrolling.

Mouse-Input Devices of computer
Mouse-Input Devices of computer

The mouse is utilized fundamentally in the application or projects or work with GUI Technology (Graphical User Interface).

The mouse is exceptionally modest, cheap, and very simple to use, its navigation and cursor moving rate are substantially speedier than that of a computer Keyboard.

Clients can without much of a stretch drag, select any documents, records, files, and folders from one area to another.

Other Examples of Pointing Devices or input devices are Barcode Reader, OCR, MCR, Joystick.

There are three types of mouse::

  • Mechanical Mouse
  • Optical Mouse
  • Infrared (IR) or radio frequency cordless mouse

Mechanical Mouse:: These are the mouse which has a circular shape rounded rubber ball at the base of the mouse which guides signs to the computer which later are interpreted.

Optical Mouse:: It has a LED (Light Emitting Diode) sensor at the base of this mouse when a client uses a mouse in any applications or projects the LED Sensor sends a flag to a computer for the additional process.

These mouse are speedier and reacts quickly.

Infrared IR:: This mouse is cod less they get their energy from batteries.


Scanners are input devices of the computer system. The client can store their images, pictures, documents that are on paper in the computer storage unit, for example, hard disk or pen drives.

The precision of scanners is practically immaculate in light of the fact that it utilizes two sorts of strategies.

LAZER and CONTACT utilize light emission on the record or paper and after that measure the light to get the estimation of the value of the picture or document.

Scanner-Input devices of computer

Scanners permit printed papers for scanning rather than at that point contribution by utilization of mouse or keyboard, decreases the conceivable outcomes of human mistake and later the outcome is stored away in computer memory for the additional process such as manipulating the images or documents inside the computer using software programs.

The user can receive the desired output of the documents after processing. Scanners are used as a part of scanning and storing huge reports or pictures without any potential outcomes of blunder

There are 2 sorts of scanners

  • Hand Held Scanners
  • Flat-bed Scanners


The trackball is a pointing device or an input device or an input gadget that comes in portable laptops and notebooks clients simply need to move their fingers around the ball for pointing, choosing and dragging the documents, files, folders, and icons.

The ball is settled inside a square box client does not need to move the box simply to move their finger. It is no like a conventional mouse where an entire mouse is moved while pointing.

It is very easy and efficient to use and can be installed in less space.


Joystick-Input devices of computer

Joystick is another input device that is utilized as a part of CAD (Computer-Aided Design) and playing PC games.

The joystick can be moved DOWN LEFT and RIGHT it has a push-button on the top which is utilized and used in playing computer games.

They likewise have a spring embedded in them to enable the joystick to come to focus when not being used. It has a vertical stick that enables the cursors to move in the graphical areas.

There are a few keyboards where the joystick is pre-installed or mounted on them.

Light Pen ::

The light pen is another pointing device or gadget which is utilized like a pen.A light pen is a pen formed device.

It comprises light sensors that are activated or utilized when it is touched to show screens. It is used for choosing and drawing pictures it sends a flag and PC which distinguishes the position of the cursor.

LightPen-Input devices of computer

It is likewise used to choose the projects or application or programs by simply going ahead it or pressing the little switch which is available in the light pen.

It is typically used as a part of CAD (Computer-Aided Design) where client needs to draw specifically on the screen.

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Touch screens::

Touch screens can show or display and get data on the same screen.

Touch might be characterized as touching the screen by fingers or by hand, they can be detected by fingers or pen-shaped stylus.

Clients can specifically collaborate with touch screens without the use of mouse or keyboard. Touch screens are considered input devices and also output devices.

Optical Card Reader (OCR):: OCR is a mechanical or electronic gadget or device which can interpret or translate images, pictures, documents, or manually written content into machine coherent shape.

OCR additionally works like a scanner that can check documents, pictures, images, hand composed content and furthermore can store in memory which later can be contrasted with the previously stored data.

For Example, Barcodes can be examined specifically from the picture design, and later this example is checked in the PC memory whether the separate information coordinates or not the information design which is already saved in computer memory.

In straightforward or simple words OCR is a gadget or device which checks the printed content character by character vertically and changes over them in machine-readable form, and the information is additionally stored in PC memory.

Magnetic Ink Character Recognition (MICR) ::

MICR is a kind of information device which is broadly utilized as a part of the banking sector where a gigantic measure of checks must be handled each and every day. Banks utilize the check No,

Account Details, Bank ID codes on every last check they display to their Account holders, these sort of points of interest are composed of an extraordinary sort of paper, and the points of interest are imprinted in ink which contains press oxide particles which can be further magnetized.

LightPen-Input devices of computer
Light Pen-Input devices of computer

MICR can read this type of information it reads the coded information on cheques and compares the details on cheques with previously stored information.

The information which is written by the Ink which contains iron oxide particulars can be read by MICR only.

Optical Bar Code Reader (OBR) ::

It is a PC input device that peruses standardized identifications.

The information is as light and dim lines which are vertically arranged with alphanumerical values these lines shift in width and height.

A standardized tag scanner utilizes a laser shaft innovation the Lazer bar which is moved adjoining the bar lines of the standardized identifications when the Lazer pillar moved it gets reflected light from the scanner tags the reflected bar is detected by a light touchy detector,

which changes over light example into electrical heartbeats and later for assist transformation of alphanumeric values.

Optical-bar-code-reader -input device

The Barcode scanner is associated with a PC system where alphanumeric values are contrasted with the information saved or stored already in PC memory.

The Optical Bar Code Reader is generally utilized as a part of Big Malls, Shopping Houses, and Libraries

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Voice Recognition Devices::

In voice recognition devices or gadgets a mouthpiece is joined to the PC system.

When a client speaks anything into the microphone the information is changed over from simple to computerized which is 0s and 1s which is in machine intelligible form which can be effectively perceived by machines.

Later this information is coordinated with information already stored in PC and after that, the fundamental activity would be taken.

WebCam ::

Webcams can take photos of any object or living thing where the photo was taken is changed over into advanced shape and store in the computer later that images or pictures can be controlled or altered in PC with exceptional altering software.

Video Camera::

Video camera or Camcorder can shoot full movement catching and this recording can be put away in PC hard disk or some other storage medium. The user can duplicate the outcome.

In the above article, we have discussed briefly on the 10 input devices of computer systems and their uses. If you enjoyed reading the content don’t forget to like and share it with your friends and colleagues

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