Here is a list of devices that may be attached to
a computer system:
LCD screen keyboard
portable hard drive mouse
touchpad laser printer
flash/pen drive microphone
digital camera speakers
web camera CD ROM drive
a
Write down the names of all the output
devices in the above list.
keyboard,
portable and drive, laser print,
speaker,
b
List two other output devices not in the
above list.
display, louderspeaker box
c
Give the name of one input device that is not
included in list above.
mouse
d
Give the name of one device in the list above
that could be used to back up data and programs
joystick
2. a.
Give two uses for each of the following
input devices in a personal computer:
i)
mouse
①Make the computer operation more
convenient;
②replace the keyboard that tedious
instructions.
ii) microphone
① Can voice chat ;
② Can get the information from others at the
first time
iii)
digital camera
① display the picture on a screen;
② digital photography on a memory card
b.
Give the names of four output devices and
give one use for each of them.
Display（get video information from it） printer
（to print paper）, louderspeaker box（get the
louder sound from it）, microphone（get small
sound from it）
3. Copy and complete the table below.
Application
Most suitable output
device
Alerting the user that
buzzer
an error has occurred
by making a beep
Printing a poster in
colour
printer
Listening to radio
Speaker
station using the
internet
Producing a large plan
Graph plotter
of a house
Producing a hard copy
monitors
of a spreadsheet
Producing a colour
printer
picture on paper taken
with a digital camera
Producing a series of
laser printer
invoices with several
copies that can be sent
to different
departments
Producing a warning
Buzzers
when a bar code is
read incorrectly
For listening to
messages from a
speakers
voicemail system
Displaying the results
screen
of a quick search on
the availability of a
holiday
4 Touch screens can often be seen at tourist
information offices.
a) Describe what a touch screen is and how it
works
Touch screen are displays that can detect the
presence and location of touch to the screen.
Usually fingers are used to make selections on
the screen , touch screen can be found in
information kiosks, all-in-one computers, table
computers,
PDAs and smartphone.
b) give one advantage of using a touch screen as
an input device for use by the general public
rather than using a monitor and mouse.
It is easier to choose a particular option
5 These are a number of different printers, each
with their own advantages and disadvantages.
The names of these printers are listed here:
laser printer
Inkjet printer
Identify the name of the printer being
described for each one of the following:
a A printer which is used in offices for printing
lots of documents in a short period of time.
laser printer
b An inexpensive printer that is ideal for the
home which can print in color as well as black and
white.
Inkjet printer
c A print which sprays the onto the page.
Inkjet printer
d the type of printer where you have to be
careful not to smudge the damp printouts as
they come out the printer.
laser printer
e the type of printer which uses a toner
cartridge.
Inkjet printer
f the printer which is cheap to bug but which has
high running costs owing to the high cost of the
ink cartridges.
Inkjet printer
Test yourself
Using the words in the list below, Copy out and
complete the sentences A to O underlining the
words that you have inserted. Each word may be
used more than once.
Input
touchpad
keyboard
microphone
scanner
character recognition
joysticks
stylus inkjet
output
optical
laser
sensors
mouse
digital
touch
A Devices used to data from the world into the
computer are called
input
deices.
B The commonest input device, which comes with
all computer, is the
CA
keyboard.
mouse is used to move a pointer or cursor
around the screen and to make selections when a
desktop computer is used.
D Where apace is restricted, such as when a
laptop is being used on your knee, a
touchpad
is used instead of a mouse.
E Joysticks are used primaril games of
software.
F. In voice recognition systems a microphone is
used as the input device.
G. The device used to input text and images is
called a keyboard.
H. Special software can be used to recognize
the individual letters in a scanned piece of text
and this is called screen.
I. Cameras that do not use film and can
transfer an image to the computer are called
digital cameras.
J. A pen-like device used to draw or write on a
table is called a stylus.
K. Quantities such as temperature and pressure
can be detected and measured using sensor.
L. Printers and plotters are examples of output
devices.
M. The type of printer that is very fast and
uses a toner cartridge is called a laser printer.
N. A cheaper printer, which squirts a jet of ink
at the paper, is called an
inkjet printer.
O. Touch screens are sometimes as an input
device for multimedia systems and are popular
for information points to be used by the general
public.