3. The keyboard has a lot of buttons called ‘KEYS’, these are divided into
many areas such as :
Alphabet keys
Function keys(F1)
Numeric keys
Arrow keys
Comand keys
The most common keyboard used is the ‘QWERTY’ keyboard
.This is because the layout is made for confort .This name
was given because the first six letters on the top row of the
alphabet.

4. Keyboards are used for entering data.
Someone who is a skilled typer and spends
a lot of time on the computer can type very
fast.
When using the keyboard for too long
.You’ll suffer from RSI a.k.a repetitive
strain injury.
when typing it is to make mistakes.

5. Pointing devices such as mouses are common
.Traditionally, the mouse used was called the
mechanical mouse ,this used a rubber ball .Later
on,the mouse used was called optical mouse this
senses light in order to detect in which direction
the mouse moves.Today the cordless mouse is used
this transmits the movement.

6. Ideal for use with desktop computers.
Mechanical
mouse Optical Cordlesss
mouse mouse
Overuse can lesd to RSI

7. Is a small area on a Ideal where space is
portable computer. limited.
When the user touches
it , the computer will
be able to tell in which
direction the user is
moving his/her finger.
moist or sweaty
fingers can disrupt
the signals.

8. Extra memory sticks
can be purchased
Pictures taken by a sepreatly.
digital camera are
stored in memory
card or on the
camera’s memory
not on a film
Digital cameras are
generally more
expensive

9. ADVANTAGES &DISADVANTAGES
Bar Code readersare The process is fast
like scanners which
use laser beams.Bar
Codes are a that give
information about the
country of the
product.
Only numbers are coded

10. has a lever which one moves to
change direction
normally joysticks contain buttons
called triggers.
allows fast interactionsrequired in most games.
some people finded harder than just using a normal
mouse.

11. Output device sare used to translate computer signals into human
readable forms.
Ouput:information that comes out of the computer.
Output devices:devices that brings out information.

12. Printers: give a hard copy of information.The speed is
calculated in pages per minute. ADVANTAGES
&DISADVANTAGES:Permenant output ,use of paper.
Impact printers: the head of the printer must hit an
inked ribbon in order to print.
Non impact printers: the head of the printer does not
touch the paper, and make less noise.
Character printer: prints one character at a time.
Line printers : Prints one line at a time
Page printer: prints one page at a time.

13. work by placing small deroplets of ink on
the paper, creating an character.
There are 2 ways the process can be done:
Thermal heat-by heat
Though Vibration: Piezoelectric.
ADVANTAGE: quiet
DISADVANTAGE:ink may be smudged

14. This is the end of my presnentation thank
you for listening 