This document discusses computer hardware components. It defines hardware as the physical parts of a computer system and categorizes it into five basic types: input devices, processors, memory, output devices, and secondary storage devices. It provides examples of common input devices like keyboards and mice, describes the processor as the brain that executes instructions, and lists memory, printers, monitors, and speakers as examples of output devices. The system unit contains the motherboard, hard disk drive, and other internal computer components. Memory is divided into cache, primary, and secondary types and RAM and ROM are described as the main memory technologies.

1. BY,
MOHAMED SHARFUDEEN
COMPUTER HARDWARE

2. What is hardware?
 HARDWARE IS THE PHYSICAL COMPONENT OF
A COMPUTER SYSTEM. IT REFERS TO THE
ELECTRICAL PARTS AND DEVICES THAT MAKE
UP A COMPUTER.
 Generally, hardware is categorized according to
the five basic operation
 it performs:
Input devices (we use to send data to computer
processor/memory)
 Processors (fetch, decode and execute data into
information)
 memory (it holds data/instructions that CPU
needs)
 Output devices (display information/results)
 Secondary storage devices (Store
data/information for later use)

3. COMPUTER SYSTEM
HARDWARE

4. PROCESSOR
 THE DEVICE THAT INTERPRETS AND
EXECUTESINSTRUCTIONS. ALSO CALLED
THE MICROPROCESSOR.
 It is called the brain of the computer,
 The faster the speed of the processor, the
faster the execution of instructions.

5. Hardware components are
Further divided into three groups.
 1. Input Devices
 2. Output Devices
 3. System Unit

6. Hardware components
 An input device lets you communicate with a
computer. You can use input devices to enter
information and issue commands.
 An output device displays information on a
screen, creates printed copies or generates
sound.
 The system unit is the part of the computer which
is responsible for accepting and processing the
data brought in by the input devices

7. Input & Output Devices

8. INPUT
DEVICES

9. KEYBOARD
A standard input device
of most computers used
to type data into the
computer

10. Mouse
is a hand-
clicked
device used for
pointing and
moving
objects
Joystick
is an input
device which
is commonly
used for
computer
games

11. Track Ball
basically an
upside
down
mouse
LGHT PEN
a device used to
draw,
write, or issue
commands when it
touches a
specially
designed screen

12. SCANNER
 A scanner allows you to scan documents
,pictures , or graphics and view them on the
computer.
Microphone
Used to input sound into a
computer

13. OUTPUT
DEVICES

14. Printers
an output device that produces text
and graphics on paper
Monitor
The monitor is used to
provide soft copy output.

15. Speaker
Play sounds transmitted as electrical signals
from the sound card.
Projector
is a type of video projector for displaying video,
images or computer data on a screen or other flat
surface

16. SYSTEM
UNIT

17. Motherboard
The motherboard is the main circuit board
of a microcomputer. It is also known as the
mainboard or system board

18. IDE
stands for Integrated Device
Electronics. is a standard
electronic interface used between
a
Computer motherboard and the
computer's disk
storage devices
Hard-Disk Drive
is a storage device that store
billons of characters of data
on a nonremovable disk

20. What is memory?
 In computing, memory refers to the physical
devices used to store programs (sequences of
instructions) or data. i.e. Text, Images, Videos
etc.
 Computer memory is the storage space in
computer where data is to be processed and
instructions required for processing are
stored.
 Memory is of three types
 Cache Memory
 Primary Memory/Main Memory
 Secondary Memory

21. Memory
The memory in a computer system is of two
fundamental types: The main/primary memory
and the secondary memory.
PRMARY MEMORY SECONDARY
MEMORY
RAM
ROM

22. Random Access Memory (RAM)
 RAM is a volatile memory, where stored
information is lost if computer is turn off.

23. Read Only Memory (ROM)
 The other major function of the BIOS is to
identify the boot device (CD-ROM, floppy disk
or hard disk) and transfer the operating
system code to RAM.
 It contains information about its hardware
devices.
 It is faster

24. Used to stores and
retrieves
information
on a floppy disk.
Floppy Disk Drive
is a device that reads
information stored on a
compact disc, it is a
storage device that use
laser technology to read
data from optical disks
CD/DVD Drive

25. Video
Card
Sound
Cardis a board that is plugged into
a computer to give it display
capabilities
enhances the computers sound
generating
capabilities by allowing sound
be
output through speakers.

26. Modem
A modem is a device that
sends and receives data
over telephone lines to and
from computers.

27. Power Supply
it supplies power from the power
supply to the drive. The power cables
are red, yellow and black. The yellow
wire furnishes 12 volts of power, the
red wire furnishes 5 volts of power,