INPUT OUTPUT DEVICES

BY:- SAROSH ABDULLAH&

PRITIKA GUPTAMBA(E-Biz) 1st Sem

Input and Output Devices

Data entry The process by which human-readable data is

converted into a machine-readable form. Data input

The process of transferring machine-readable data into the computer system.

Source data automation Capturing and editing data where the data is

originally created and in a form that can be directly input to a computer

Input Devices Input Devices accept data and instruction from

the user or from another computer system.

These are use to give command to the computer system.

To receive data and instructions in a form that can be understood by the computer.

Types Of Input Devices

Keyboard

Mouse

Trackball

Joystick

Pen drive

Microphone Webcam

Voice recognition devices

Digital computer cameras

Terminals

Scanning devices

Optical data readers

Automatic Teller Machine (ATM)

Light pens Touch sensitive screens Bar code scanners Point Of Sale (POS)

devices Magnetic Ink Character

Recognition (MICR) Printers Bluetooth devices

Keyboard

It is a set of keys which are used to send the computer an interrupt request, telling the CPU to accept the keystroke.

The system software respond to interrupt by reading the code from keyboard buffer.

The system software passes the scan code to CPU.

Mouse The mouse is a pointing device. We use it

to move a graphical pointer on the screen.

The mouse can be used to issue commands, draw, and perform other types of input tasks.

Using the mouse involving 5 techniques- pointing, clicking, double clicking, dragging, right-clicking.

Joystick A Joystick is a personal general control

device consisting of a handheld stick that pivots about one end and transmits its angle in 2 or 3 dimensions to a computer.

Apart from controlling games, joysticks are also used for controlling machines such as aircrafts, cranes, trucks, powered wheelchairs and some zero turning radius lawn mower.

Touch Pad Touch pad is an input device commonly

used in laptop computers. They are used to move the cursor using motions of the user’s finger. They are a substitute for a computer mouse.

These are touch sensitive devices which gets activated on a finger touch.

Touch pad are used to give instructions directly through monitor.

Scanner Scanner can copy a printed page of text

or a graphic into the computer’s memory, freeing from creating the data from scratch.

The flatbed scanner is the most common in the offices.

Other type of scanner are – planetary scanners, digital camera scanners, 3D scanners, drum scanners etc.

MICROPHONE

A microphone, colloquially called a mic or mike (both pronounced /ˈmark/), is an acoustic-to-electric transducer or sensor that converts sound into an electrical signal.

In 1876, Emile Berliner invented the first microphone used as a telephone voice transmitter.

Microphones are used in many applications such as telephones, tape recorders, hearing aids, motion picture production, live and recorded audio engineering, in radio and television broadcasting and in computers for recording voice, VoIP, and for non-acoustic purposes such as ultrasonic checking.

WEBCAM

Webcam is the short form for web camera.

It us a type of input device which helps in taking photos and transferring them in the computer.

Webcams are used while having conferencing or having a photo chat.

Magnetic Ink Character Reader(MICR)

LIGHT PEN

DIGITAL CAMERA

OUTPUT DEVICES An output device is any piece of computer hardware

equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) to the outside world.

In computing, input/output, or I/O, refers to the communication between an information processing system (such as a computer), and the outside world. Inputs are the signals or data sent to the system, and outputs are the signals or data sent by the system to the outside.

The most common input devices used by the computer are the keyboard and mouse. The keyboard allows the entry of textual information while the mouse allows the selection of a point on the screen by moving a screen cursor to the point and pressing a mouse button. The most common outputs are monitors and speakers.

Types Of OUTPUT DEVICES

• Monitor• Printer• Pen drive• Compact Disk• Plotters• Snapshot printers

MONITORS

PRINTERS