2. Internal Hardware
The Processor
This is the “brain” of the Computer.
It is a small piece of electronics; the processor
(CPU or Central Processing Unit) is at the bottom
of all functions that PC performs.
RAM
RAM (Random Access Memory) has all of the
“active” information that the computer is using.
Memory is empty when your PC is switched off.
3. Internal Hardware
Hard Disk
It is the computer’s permanent storage capacity.
Size of the Hard Disk determines how many files
can be saved in your computer.
Unlike RAM, you can store your files
permanently.
Mother Board
It is the main circuit board inside your computer.
All other components are connected to specific
slots on Mother Board
4. Internal Hardware
Sound Card
This hardware component is used to send sound
to your speakers.
It’s a card which is usually built into motherboard
where you plug you’re speaker cables into.
LAN Card
LAN or network card is used to connect your PC
to a Network.
6. External Hardware
Keyboard
Used to insert text.
Follows QWERTY key layout, which is standard
for most keyboards.
Monitor
The screen or Display found on most computer
systems – used to see the results of Processing.
Speakers
Used for producing sounds.
7. External Hardware
Mouse
Selecting icons or options form on-screen menu.
Can also be used for drawing shapes.
Microphone
Receive Sounds such as voices.
Printer and Scanner
Produces copies of results on paper ‘Hardcopy’.
Scanner is used to copy documents and store
them as files on computer.
8. Printers
Printer is an External Hardware device responsible for taking computer
data and generating a hard copy of that data.
Printers can be classified as:
Impact Printer: It operates by striking a metal or plastic head against an ink
ribbon.
Non-impact Printer: These are generally quieter as they don’t physically strike
the page. For example, inkjet printers spray tiny drops of ink onto the page.
11. Scanner
FLAT BED SCANNER
It provides a flat, glass surface to hold pages and
other object for scanning.
The scan head is moved under the glass across
the page.
SHEET FED SCANNER
It allows only paper to be scanned rather than
books or other thick objects.
Smaller in size than flatbed scanner.
12. Scanner
HANDHELD SCANNER
It is moved by hand over the material being
scanned.
Small and less expensive.
Trays are available to keep moving scanner in
straight line.
PHOTO SCANNER
Mostly used for scanning photographs.
Scan photographs with high quality.
13. Ports on Computer
There are lots of external
devices that you can connect
to your computer.
These devices connect to
computer via cables and
ports.
14. Computer Case Types
DESKTOP CASE
They are considered the most classical version of
computer cases.
It is primarily designed for personal/business computers
that are placed on top of desk.
TOWER CASE
These cases are usually placed on the floor.
It consist of a lot of internal hardware and is mainly
used for high performance application i.e., games,
video edition etc.