The document discusses various types of computer input devices, including keyboards, pointing devices like mice and touchpads, touch screens, game controllers, digital cameras, microphones, webcams, scanners, biometric devices, and terminals. It provides details on how each device works and examples of specific devices within each category. The input devices covered allow users to enter text, commands, photos, sound, and other data into computers through physical interaction or digital conversion of real-world items.

1. Input Devices
Slides By Rana Usman Sattar
Student Of BBA(Hons)
PMAS Arid Agriculture University Rawalpindi
Gmail: ranaa.usman@gmail.com
Facebook: usman.shan86@yahoo.com

2. What Is Input?
 Input is any data and instructions
entered into the memory of a
computer
 An input device is any hardware
component that allows users to enter
data and instructions
(programs, commands, and user
responses) into a computer.
 Depending on the application and your
particular requirements, the input
device selected may vary.

3. The Keyboard
 A keyboard is an input device that
contains keys users press to enter
data and instructions into a computer
 Keyboard Ergonomics
◦ Design that reduces the chance of wrist
and hand injuries
 Keyboards for Mobile Computers
and Mobile Devices

4. Pointing Devices
 A pointing device is an input device
that allows a user to control a pointer
on the screen.
 In a graphical user interface, a pointer
is a small symbol on the screen
 Mouse
 Trackball
 Touchpad
 Pointing Stick

5. Touch Screens and Touch-Sensitive Pads
 Touch screens that recognize multiple
points of contact at the same time are
known as multi-touch.
◦ Laptop
◦ Notebook
◦ Kiosk
◦ Mobile & Tablets
◦ Microsoft Surface
 Touch-Sensitive Pads
 Pen Input

6. Game Controllers
 Video games and computer games
use a game controller as the input
device that directs movements and
actions of on-screen objects
 Gamepads
 Joysticks and Wheels
 Light Guns
 Dance Pads
 Motion-Sensing Game Controllers

7. Digital Cameras
 A digital camera is a mobile device
that allows users to take pictures and
store the photographed images
digitally, instead of on traditional film.
 Digital Camera Photo Quality
◦ Resolution is the number of horizontal
and vertical pixels in a display device. A
pixel (short for picture element) is the
smallest element in an electronic image

8.  Voice input is the process of entering
input by speaking into a microphone
 Audio input is the process of entering
any sound into the computer such as
speech, music, and sound effects.
 Video input is the process of capturing
full-motion images and storing them on a
computer’s storage medium such as a
hard disk or optical disc.
 A Web cam also called a PC video
camera is a type of digital video camera
that enables a home or small business
user to capture video and still images

9. Scanners and Reading
Devices
 An optical scanner, usually called a
scanner, is a light-sensing input device
that reads printed text and graphics
and then translates the results into a
form the computer can process.
 A flatbed scanner works in a manner
similar to a copy machine except it
creates a file of the document in
memory instead of a paper copy

10. Optical Readers
 An optical reader is a device that uses a
light source to read
characters, marks, and codes and then
converts them into digital data that a
computer can process.
 Optical character recognition (OCR)
 Optical mark recognition (OMR)
 Bar Code Readers
 RFID Readers
 MICR Readers
 Magnetic Stripe Card Readers

11. Biometric Input
 Biometrics is the technology of
authenticating a person’s identity by
verifying a personal characteristic.
 hand geometry
 voice verification system
 signature verification system
 Iris recognition system
 Finger Scanning

12. Terminals
 A terminal is a computer, usually with
limited processing power, that enables
users to send data to and/or receive
information from a host computer.
 Point-of-Sale Terminals
 Automated Teller Machines