The document provides an overview of computer hardware, specifically focusing on input and output devices. It explains the functions of the CPU, motherboard, and various types of input devices such as keyboards, mice, and scanners, as well as output devices like monitors, printers, and speakers. Additionally, it discusses the modem as a device that serves both input and output purposes.

1. COMPUTER
HARDWARE
(Input and Output devices)

2. Refers to the TANGIBLE
components of a computer
system.
COMPUTER HARDWARE

3.  CPU is considered as the brain of
the computer. CPU performs all
types of data processing
operations.
CPU
(Central Processing
Unit )

4. Motherboard
 The motherboard is at the center of what
makes a PC work.
 It houses the CPU and is a hub that all other
hardware runs through.
 The motherboard serves as a single platform
to connect all of the parts of a computer
together.

5. Hardware
Components
01
The System Unit
Input Devices
Output Devices
Computer Memory
Secondary Stoarge
Devices
02
03
04
05

6. INPUT
DEVICES
01

7.  Input Devices perform the two most basic
computing tasks:
a. Issuing commands
b. Entering data
 Data entry is defined as the process of
entering data into the computer memory and
issuing commands that tell the processor to
work with the data.
INPUT
DEVICES

8. Types of Input Devices
Keyboard
 The keyboard is the
standard input device of
most computers. It was
patterned after the
typewriter and keypad of
an elctronic calculator.
Numeric
keyboard
Control Keys
Navigation
Keys
Function Keys
Escape
Key
QWERTY
KEYBOARD

9. Types of Input Devices
Mouse
The mouse is hand-clicked
device used for pointing. The
modern mouse uses a ball for
movement and has two to three
buttons.

10. Types of Input Devices
Joystick
 The joystick is an
input device which
commonly used for
computer games. It
allowss sudden,
rapid movements in
all direction- a must
in most computer
games.
Trackball
 Trackball is another
commonly used pointing
device. It is like a
stationary, upside down
mouse. Trackball does not
require as much hand eye
coordination nor does not
require the extra desk
space necessary to move
as the mouse.

11. Types of Input Devices
Light Pen
The Light pen is a used to draw, write or
issue commands when it touches a
specially designed screen. It was originally
developed for computer aided drafting at
the Massachusetts Institute of Technology
in 1964.

12. Types of Input Devices
Video Input Devices
 The most common
video input device is
called the DIGITAL
CAMERA, which takes
still photograph and
transfers them directly
into the computer.

13. Types of Input Devices
Text Input Devices
 Copying the text contents of
another printed material such as
an old book is error prone.
 One such device is the scanner. It
is a light sensitive device to enter
text or even graphics.
 The flatbed scanner is ideal for
material in flat surface.
 Hand-held scanner is used to
capture images in materials
which are not flat.

14. 02
OUTPUT
DEVICES

15. 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)
which converts the electronically
generated information into
human-readable form.

16. COMPUTER GENERATED
OUT PUT
TEXT OUTPUT - is simply the alphanumeric characters that make up
our language.
GRAPHIC OUTPUT - includes line drawings, maps business
presentation graphics, computer aided design, computer graphics and
photographic reproduction.
SOUND OUTPUT - ranges from message beeps produced by the
computer system to the voice to music.
VIDEO OUTPUT - refer to photographs or moving images.

17. MONITOR
PRINTER
SPEAKERS
PROJECTOR
HEADSET

18. Types of Output Devices
MONITOR
 It is the most computer
devices.
 It creates a visual display by
the use of which users can
view data
 Monitors come in various in
sizes and resolution.

19. Types of Output Devices
PROJECTOR
 A device that
projects computer output onto a white
or silver fabric screen that is wall,
ceiling or tripod mounted.
 It is widely used in classrooms and
auditoriums for instruction and slide
presentations.
 For projectors designed primarily to
display movies, see front-
projection TV.

20. Types of Output Devices
SPEAKERS
 attached to the
computer to facilitate
the output sound.
 it requires sound cards
the computer to the
speakers be functional.

21. Types of Output Devices
HEADSET
 A combination of
microphone and
speaker.
 It is mostly use by
gamers and also a great
tool for communication

22. Types of Output Devices
PRINTER
 A printer is an output
device that prints paper
documents.
 This includes text
documents, images, or
a combination of both.

23. Types of Printer
IMPACT PRINTER - PRODUCES AN OUTPUT USING
MECHANISM THAT PRESSES AGAINST AN INKED RIBBON ON
PAPER AND IT WAS PATTERENED AFTER THE TYPEWRITER.
DOT MATRIX AND LETTER QUALITY PRINTERS ARE EXAMPLES
OF IMPACT PRINTER.
NON IMPACT PRINTER -USES A PHOTOCOPIER-LIKE
PROCESS TO TRANSFER INK TO A PIECE OF PAPER. THE
QUALITY OF OUTOUT FROM LASER PRINTERS. HOWEVER, A
NON IMPACT PRINTER IS MORE EXPENSIVE THAN AN
IMPACT PRINTER. EXAMPLE ARE LASER PRINTER, INKJET
PRINTERAND PLOTTER.

24. MODEM
A DEVICE THAT CAN BE USED FOR BOTH INPUT AND OUTPUT. THE
MODEM IS USED TO CONNECT ONE COMPUTER TO ANOTHER VIA
CONVENTIONAL TELEPHONE LINES. AS AN INPUT DEVICE, IT
TRANSLATES SIGNAL IT RECEIVES THROUGH THE PHONE INTO
SOMETHING THE COMPUTER CAN UNDERSTAND.
AS AN OUTPUT DEVICE, IT TRANSLATE COMPUTER SIGNALS INTO
SOMETHING WHICH CAN BE UNDERSTOOD BY THE TELEPHONE
LINES. THE TWO PROCESSES ARE CALLED MODULATION AND
DEMODULATION.

25. THANK YOU!
God bless you!
Stay safe, everyone!