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1. Computer Science
The Ins and Outs of Systems
Group Memebers:
Arham Saad Zakai
Muhammad Aayan Jamil
Aoun Muhammad
MuhammadYahya

2. MICROPHONE
A Microphone is an input device that was
developed by Emile Berliner in 1877. A
microphone captures audio by converting
sound waves into an electrical signal.
Through a microphone the voice pattern of
the user is then converted into instructions
to the operating system or applications
software, or into text on the screen. While
all the microphones serve the same basic
function they can capture audio in several
different ways. Microphones are used for
online chatting, voice recording, e.t.c.
By Aoun Muhammad

3. Graphics tablets ( digitisers )
A graphics tablet is a input device which
enables a user to hand-draw images,
animations and graphics. Graphics tablets are
rather like electronic tracing paper and they
come in all sizes. A pen, cursor or puck is used
on a graphics tablet to draw on the tablet
screen or trace over technical drawings put
on the screen using a computer aided design
package.
By Arham Saad Zakai

4. Laser Printer
Laser Printer is an output device which was
invented at Xerox in 1970. Laser printers
produce high quality text and graphics. For
printing, laser printers have toner cartridges
that contain electrically charged, powdered
black plastic called toner. Over the decades
the quality and speed have increased as
prices have decreased.
ByYahya

5. Digital Camera
Digital cameras are input devices and the first actual digital still camera was
developed by Eastman Kodak engineer Steven Sasson in 1975.
They are becoming very popular these days for a number of reasons:
1. No film is needed
2. There are no expensive costs
3. You can put photographic images directly into a document without a
scanner.
4. As the pictures are in digital form, they can be sent immediately over the
internet.
5. You can even crop, enlarge, reduce your image using any software.
Digital Cameras are just like traditional cameras but they do not have any film.
Instead they have a memory which stores the image and many of them have
special memory cards to give extra storage.The more the memory, the greater
the number of pictures which can be taken.
The amount of memory taken up depends on its resolution.The resolution is
determined by the number of dots which make up the picture; the greater the
number of dots the crisper the image. Higher resolution photographs take up
more memory.
As well as the camera, you need special software to edit, store and display your
pictures on a computer. Using this software, you can remove irrelevant items
from the image; adjusting the colour, contrast and sharpness of the image
accordingly.
It is also possible to take the outline of a person and put them into an entirely
different background.

6. Thank You