The document discusses the different types of computer hardware. It defines hardware as the physical parts of a computer like the monitor, mouse, and keyboard. The document then categorizes hardware into four types: input devices like keyboards and mice; processing devices like the CPU and motherboard; storage devices like hard disks and CD-ROMs; and output devices like monitors, speakers, and printers. Each category is described with examples to explain the function of hardware in a computer system.

1. Types of Computer
Hardware
MR. N. SEATON
Information Technology 8th Grade

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As a result of this lesson, you should be able to:
Identify key Terms relating to computer hardware
Identify
Classify computer hardware in different categories
Classify
Explain the criteria used to categories each peripheral device.
Explain

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What is a Computer?
A computer is an electronic programmable
device that:
 Accepts data and instructions from user (input)
 Process data (processing)
 Stores the information for later retrieval (storage)
 Produces result (output)

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A Computer System
 A computer system refers to the complete
computer, which includes all the
hardware and software required for the
computer.

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Hardware
and Software
A computer has two components;
hardware and software that makes up
the entire computer.
 Hardware are the physical parts of
the computer that you can touch;
these include monitor, mouse,
keyboard, etc.
 Software are the instructions that tell
the computer what to do, it also
controls the computer hardware.

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Types of Hardware devices
Computer hardware is divided into:
 Input Devices
 Processing Devices
 Storage Devices
 Output Devices

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Input
Devices
Input devices allow you to
enter data or instructions
into the computer.
Examples of input devices
include Keyboard, Mouse,
Joystick, Scanner, Touch
Pad, Light Pen, etc.

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Keyboard
 A keyboard is used to enter information into a
computer system.
 Keyboards contain a number of keys, including
alphanumeric characters punctuation symbols
and various keys.

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Mouse
 A mouse is used
to move cursor
on a monitor,
enabling control
of the Graphic
User Interface.
 The mouse is
used to input
instructions into
the computer.

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Joystick
 A joystick is an input device
that can be used for
controlling the movement of
the cursor or a pointer in a
computer device.
 The input device is mostly used
for gaming applications and,
sometimes, in graphics
applications.

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Scanner
 scanner is a hardware input device that
optically "reads" an image and converts it to a
digital signal.
 The scanner converts a hard copy of a
document into images on the computer screen.

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Processing Devices
 When a computer receives data from an input device it goes
through a process to turn that data into information.
 A processing device ins one that performs operations on the
data at this stage.
 Examples of processing devices include the CPU, GPU,
Motherboard, network card, etc.
 Processing devices convert data entered into the computer
into meaningful Output.

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CPU
 The CPU (Central Processing Unit) is
often referred to as the brain of the
computer.
 The CPU processes the instructions or
data that comes from the input
devices.
 The CPU is a small chip found on the
motherboard.

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Motherboard
 A motherboard is the main circuit board inside a
computer that connects the different parts of a
computer together.
 The motherboard is the backbone that ties the
computer's components together at one spot and
allows them to talk to each other.

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Storage Devices
A storage device is a
piece of hardware that
is primarily used for
storing data.
Some common storage
devices are hard disks,
Flash drive, CD ROM,
DVD ROM, Magnetic
Tape, Floppy disk, etc.

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CD ROM
CD ROM is short for Compact Disc
Read-Only Memory
A CD ROM is an optical disk used
to stores audio and other files

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Hard Disk
 The hard disk is found inside the system unit and
is the main storage device of the computer.

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Output devices
An output device is any device that receives information from a
computer, usually for display, projection, or physical reproduction.
Output devices gives information to the user through different
methods.
Examples of output devices include monitor, speakers, printers, etc.

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Monitor
 A monitor is a
visual display
unit which
display
information
generated by a
computer.
Touchscreen
allows input by
user.

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Speaker
 Speakers are used to
output sound.

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Printer
 A printer creates a
physical copies of on-
screen data and
information