The document discusses the key components of computer hardware. It defines hardware as the physical components of a computer system, which are further divided into input devices, output devices, and the system unit. Input devices allow entering data into the computer, output devices display or share the data, and the system unit contains the central processing unit, memory, storage, and ports to connect everything. Examples are provided for common input devices like keyboards and mice, output devices like monitors and speakers, and internal components such as the motherboard, CPU, RAM, and hard drive.

1. Hardware
• The history of computing
hardware covers the
developments from early simple
devices to aid calculation to
modern day computers. Before
the 20th century, most
calculations were done by
humans. Early mechanical tools
to help humans with digital
calculations, like the abacus, were
referred to
as calculating machines or calcula
tors (and other proprietary
names). The machine operator
was called the computer.

2. Computer Hardware

3. Computer hardware:
Is the physical components of the computer , refers to the
tangible(things you can touch) components of a computer
system.

4. Hardware components are furthure
divided into three groups
• Input devices
• Output devices
• System unit
Responsible for
accepting and
processing the data
brought in by the input
devices.
Display information
on a screen,creates
printed copies or
generates sound.
Communicate with a
computer.we can use
input devices to enter
information and issue
commands.

5. Input Devices

6. Input Devices
• Keyboard: is a standard input device of most computers
used to type data into the computer.
• Mouse: is a hand-clicked device used for pointing and
moving objects.
• Joystick: is an input device which is commonly used for
computer games.
• Track ball: basically an upside down mouse.
• Light pen: a device to draw write or issue commands when
it touches a specially designed screen.
• Scanner: A scanner allows you to scan
documents,picture,or graphics and view them on the
computer.
• Microphone: used to input sound into a computer.

7. Output Devices

8. Output Devices
• Printer: an output device that produces text and graphics
on paper. Inkjet,laser and impact printer are examples.
• Monitor: the monitor is used to provide soft copy output.
• Multimedia projector: is a type of vedio projector for
displaying vedio,images or computer data on a screen or
other flat surface.
• Speaker: play sounds transmitted as electrical signals from
the sound card.
• Headphones: are a pair of small loudspeaker drivers worn
on or around the head over a user’s ear.
• Web cam: is a video camera that feeds or streams an image
or video in real time to or through a computer
network,such as the internet.

9. System Unit

10. CPU & Power Supply
CPU Power Supply
Carries out each instruction of
the program in sequence,to
perform the basic arithmetical
, logical and I/O operations of
the system.
The primary func
power supply is to
electric current fro
to the corre
voltage,current,and
to power the l

11. Hard Disk Derive
RAM
(primary
memory)
Secondary
Memory
Memory: The memory
in a computer system is
of two fundamental
types: The main
memory and the
secondary memory.

12. Video
Card
Sound
Card
Modem

13. ….
Video card:
Sound card:
Modem:
• Is a board that is plugged into
a computer to give it display
capabilities.
• Enhances the computers
sound generating capabilities
by allowing sound to be
output through speakers.
• A modem is a device that
sends and receives data over
telephone lines to and from
computers.

14. Motherboard

15. Hardware Application
Application of important accessories in
hardware technology are—
Transmission of
knowledge
Accumulation of
knowledge
Spread of
knowledge