Input Devices: Keyboards, Mice, and More

ISM 11013 - Information and Communication Technology
1
ISM 11013 - Information and
Communication Technology
By:
M. Mohamed Shiraj
Senior Lecturer in Information Technology
Department of Management / FMC
South Eastern University of Sri Lanka
Chapter 05
➔Input, Output devices
Chapter Objectives
❑ Define input
❑ List the characteristics of a
keyboard
❑ Describe different mouse
types
and how they work
❑ Summarize how various
pointing
devices work
❑ Explain how voice
recognition works
❑ Describe various input
devices
for PDAs, smart phones,
and Tablet PCs
❑ Explain how a digital camera
works
❑ Describe uses of PC video
cameras,
Web cams, and video
conferencing
❑ Discuss various scanners
and reading devices and
how they work
❑ Explain the types of
terminals
❑ Summarize the various
biometric devices
❑ Identify alternative input
devices for physically
challenged users
Shiraj Mohamed M | SEUSL
2
Input
❑Data or instructions entered into
memory of computer
❑Input device is any hardware
component that allows users to enter
data and instructions
Shiraj Mohamed M | SEUSL
3

ISM 11013 - Information and Communication Technology
2
Input Devices
❑Any peripheral (piece of computer
hardware equipment) used to provide
data and control signals to a computer.
❑Allows the user to put data into the
computer.
❑Without any input devices, a computer
would only be a display device and not
allow users to interact with it.
Shiraj Mohamed M | SEUSL
4
Types of input
❑Data
❑Unprocessed text, numbers,
images, audio, and video
❑Instructions
❑Programs
❑Commands
❑User responses
Shiraj Mohamed M | SEUSL
5
The Keyboard
❑Typing area
❑Numeric key
❑Function keys,
special keys that
issue commands
Shiraj Mohamed M | SEUSL
6

ISM 11013 - Information and Communication Technology
3
The Keyboard
Shiraj Mohamed M | SEUSL
7
Insertion point
❑Blinking vertical bar that indicates where next
character you type will display.
❑Pointer changes location and shape as you move
mouse or other pointing device
Shiraj Mohamed M | SEUSL
8
Types of keyboards
❑Standard
❑Laptop
❑Gaming and Multimedia
❑Thumb-sized
❑Virtual
❑Foldable
Shiraj Mohamed M | SEUSL
9

ISM 11013 - Information and Communication Technology
4
Input Devices
Types of Keyboard
❑ The laptop computer keyboard
is a small version of the
typical QWERTY keyboard.
❑ A typical laptop has the same
keyboard type as a normal
keyboard, except for the fact
that most laptop keyboards
condense the symbols into
fewer buttons to
accommodate less space.
1
0
Shiraj Mohamed M | SEUSL
10
Input Devices
Types of Keyboard
❑ The gaming keyboards are designed for
the convenience of the gamers and
these types of keyboards provide the
required controls on the keyboards like
back lighting.
11
Shiraj Mohamed M | SEUSL
11
Input Devices
Types of Keyboard
❑ Smaller external
keyboards have been
introduced for devices
without a built-in
keyboard, such as
PDAs, and
smartphones.
❑ Small keyboards are
also useful where
there is a limited
workspace.
12
Shiraj Mohamed M | SEUSL
12

ISM 11013 - Information and Communication Technology
5
13
Input Devices
Types of Keyboard
❑ Virtual Keyboard
❑ The virtual keyboards are not actually
physical keyboards, but they are
simulated using a software.
Shiraj Mohamed M | SEUSL
13
Input Devices
Types of Keyboard
❑ Foldable Keyboard
❑ Foldable keyboards
are extremely
good for
travelling.
❑ Simply roll them
up and then unroll
them when you
need them again.
14
Shiraj Mohamed M | SEUSL
14
15
Input Devices
Keyboard Layouts
❑ QWERTY
❑ QWERTZ
❑ AZERTY
❑ DVORAK
Shiraj Mohamed M | SEUSL
15

ISM 11013 - Information and Communication Technology
6
16
Input Devices
Key Types
Function keys
• The Function keys or F1 through F12 keys
are used in programs as shortcut keys to
performed frequently performed tasks.
• For example, the F1 key is the key to open
the online help for most programs.
Shiraj Mohamed M | SEUSL
16
17
Input Devices
❑ Pointing Devices
❑ A pointing device is a hardware
input device that allows the user to
move the mouse pointer to select
items on a display screen.
❑ Types of pointing device:
❑ Based on rolling a ball
❑ Based on touching a surface
❑ Based on moving stick
Shiraj Mohamed M | SEUSL
17
18
Input Devices
Pointing Devices
❑Based on
rolling a ball
❑Example:
❑Mouse
❑Trackball
Shiraj Mohamed M | SEUSL
18