2. • The computer system unit, often refers to
the physical enclosure that houses the
essential internal components of a
computer. It acts as the central hub for all
the hardware that enables the computer to
function. This unit is distinct from the
peripheral devices such as the monitor,
keyboard, and mouse, which are external
components that interact with the system
unit.
2
4. Central Processing Unit (CPU)
• The CPU is the primary
control centre of the
computer, and it
facilitates communication
and collaboration between
different hardware and
software computer
components. It is also
usually the most complex
and valuable part of the
entire system because of
its complicated design
and utility.
4
5. • The motherboard acts
as the central electrical
circuit by connecting
different parts, and
distributing power as
per energy requirement
and delivering
information and
instructions across the
computer system.
5
Motherboard
6. Random Access Memory (RAM)
RAM is the memory space that houses
temporary data, processes, information
and commands. When you launch a
program or use an application, it uses the
RAM to stay active and work optimally. 6
7. • A video graphics array (VGA)
port is a connector usually
present in desktops and
other display devices. It is
typically present on the side
or back of a monitor or
display screen and helps
share the screen or visuals
with another machine.
Special VGA cables may be
required to facilitate this
sharing. You may also
require the VGA port to
connect a computer or
laptop to a projector. The
quality of visuals often
depends on the number of
connectors in the port.
7
Video Graphics Array (VGA)
8. Power Supply
• The power supply port provides electricity
that activates the entire computer system.
Usually, the power chord is present at the
back of the CPU or the PC tower and goes
directly into the electricity socket. Places
with variable power supplies may use a
UPS or uninterrupted power supply unit to
ensure that fluctuations do not impact the
computer's performance.
8
10. Cooling Fan
• A computer system or laptop
uses electricity to operate
and produces heat in the
process. All CPUs and
laptops have a cooling fan to
circulate air in the internal
system and prevent
overheating. High-end
computers may also have
more than one cooling fan to
ensure that the user can use
heavy-duty applications that
require high performance
from the system.
10
11. •
•
Hard drives are the
storage devices that save
the file, information and
programs. They are
usually magnetically
coated discs that store
all this data digitally.
Hard drives with high
storage can naturally
save more data. You can
also purchase external
removable storage
devices to manage data
more efficiently.
• Alternatively, you can
also move your data
to cloud-based
storage services and
save storage memory
on your system. Hard
drives are susceptible
to failure, and backing
up your drives
regularly is a good
practice.
11
Hard Drive
13. • The sound card
processes and
outputs audio signals,
allowing the
computer to produce
sound for music,
videos, and system
alerts.
13
Sound Card
14. • The video card
converts digital data
into visual images
that are displayed on
the monitor. It plays a
crucial role in
graphics processing,
especially for gaming
and multimedia
applications.
14
Video Card
15. Network Card • The network card
enables the computer to
connect to a network,
allowing it to
communicate with other
devices and access the
internet.
15