1. ROLL No. BSIT-F13E124

2. Name : Sultan Sikandar
Roll No : BSIT-F13E121
Topic: Input- Input devices

3. What Is Input?
• Input is any data and instructions entered into the
memory of a computer
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4. DATA is a collection of unprocessed
items,including
text, numbers, images, audio, and video.
INSTRUCTIONS are the commands given
to the computer by user to process the data
into information(output). Instructions
entered into the computer can be in the form of
programs, commands, and user responses.

5. A user response is an instruction a user issues by
replying to a question displayed by a program.
A response to the question instructs the program
to perform certain actions.
Assume the program asks the question, Is the time card
correct? If you answer Yes, the program processes the
time
card. If you answer No, the program gives you
the opportunity to modify the time card entries.

6. Types of Input
• Voice input is the process of entering input by
speaking into a microphone
• Voice recognition is the computer’s capability of
distinguishing spoken words
• Audio input is the process of entering any sound
into the computer
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7. Other Types of Input
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Figure 5-12
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8. What Is Input device?
An input device
is any hardware
component that
allows users to
enter data and
instructions into
a computer
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9. • Examples of Input devices include
keyboard, Mouse, Monitor and usb or compact
discs etc.
•
Storage devices, such as disk drives, serve as
both input and output devices.

10. Name : Malik Rahib
Roll No: BSIT-F13E122
Topic : Keyboard-an input device

11. The Keyboard
• A keyboard is an input device that contains keys
users press to enter data and instructions into a
computer
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Figure 5-2
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12. Keyboard
• Most desktop computer keyboards have…
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13. Usually a keyboard consists of:
• Typing area that includes the letters of the
alphabet, numbers , punctuation marks and other
basic keys.
• A Numeric Keypad on the right side of keyboard.
• Function keys( two ctrl keys, two ALT keys and a set
of arrows) are special keys programmed to issue
commands to computer.
To issue commands user often press function key in
combination with another key(e.g ctrl+S is a short key
to save a document.

14. • Keyboards also often have a windows key(s) and
an Application key. When pressed, the windows
key displays the windows start menu, and
Application key displays an items shortcut menu.
• A Toggle key is a key that switches between two
states each time the user presses a key.
e.g when you press the NUM Lock key, it locks
the numeric keypad, so that you can use the
keypad to type numbers. When it is pressed
again, numeric keypad unlocks so that the same
keys can serve to move around a document.

15. Name : Ahmad Bashir
Roll No : BSIT-F13E123
Topic : Keyboard ErgonomicsKeyboard for mobile devices

16. Keyboard Ergonomics
• An ergonomic keyboard has a design that reduces
the chance of wrist and hand injuries
• Ergonomics incorporates comfort, efficiency, and
safety into the design of the workplace
Click to view Web Link,
click Chapter 5, Click Web
Link from left navigation,
then click Ergonomics
below Chapter 5
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17. Keyboards for Mobile Computers and
Mobile devices
• Keyboards on mobile devices typically are smaller
and/or have fewer keys
• Some phones have predictive text input, which
saves time when entering text using the phone’s
keypad
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Figure 5-3
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18. • A typical notebook computer keyboard usually
has only about 85 keys. To provide all of the
functionality of a desktop computer
keyboard, manufacturers design many of the keys
to serve two or three purposes.
• In smart phones, there is a built in on-screen
keyboard, where you press the on screen keys
using a stylus or your finger.
• Some smart phones have one key for each letter
of the alphabet, often called a mini keyboard.

19. Pointing Devices
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20. Page 192
Figures 5-5 – 5-7
• A touchpad is a small,
flat, rectangular
pointing device that is
sensitive to pressure
and motion
Discovering Computers Fundamentals, 2010 Edition
Chapter 5
Pointing Stick
• A trackball is a
stationary pointing
device with a ball on
its top or side
Touchpad
Trackball
Pointing Devices
• A pointing stick is a
pressure-sensitive
pointing device
shaped like a pencil
eraser that is
positioned between
keys on a keyboard
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21. Mouse
• A mouse is a pointing device that fits under the
palm of your hand comfortably
– Most widely used pointing device on desktop
computers
• A mouse can be wired or wireless
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22. • With a mouse, user controls the movement of the
pointer, often called a mouse pointer. As you move
a mouse, the pointer on the screen also moves.
The top and sides of a mouse have one to four
buttons. The bottom of the mouse is flat and
contains a mechanism that detects the movement
of the mouse.
Pointing devices

23. Name: Amber Noor Malik
Roll NO: BSIT-F13E124
Topic : Using a Mouse

24. Using a Mouse
• Windows users work with a mouse that has at
least two buttons. For a right-handed user, the left
button usually is the primary mouse button, and
the right mouse button is the secondary mouse
button. Left-handed people, however, can reverse
the function of these buttons.

25. • Some programs also use keys in combination with
the mouse to perform certain actions.
For example, when you hold down the ctrl key
while rolling the wheel, text on the screen
becomes larger or smaller based on the direction
you roll the wheel. The function of the mouse
buttons and the wheel varies depending on the
program.