2. Digital Technology is a type
of electronics. These make
use of "Boolean logic" and
"discrete signal electronics"
for electronics, devices, and
equipment.
Examples of such devices
are computers, information
appliances, digital cameras,
digital televisions, flash
memory, key USB
memory, mobile
phones, hard disks, and
devices of computer
memory.
4. A computer is a machine that is able to take
information (input), do some work on or make
changes to the information, to make new
information (output). Computers have existed
for much of human history. A person (called a
user) can control a computer by telling it to do
things. Some ways of controlling a computer
are with a keyboard, mouse, buttons, touch
screen. Some very new computers can also
be controlled with voice commands or hand
gestures.
6. A digital camera is
a camera that stores pictures
on a memory card instead
of film. Because of this, a
digital camera can hold many
more pictures than the
traditional film camera. A digital
camera can sometimes hold
hundreds of pictures. There are
different sizes of memory cards
and each size can hold a
different number of pictures.
Most digital cameras can use
a USB cable that connects into
a computer to take the pictures
that are in the camera and
send them to the computer.
7. An MP3 player is a portable
audio device people can use to
listen to songs saved in
the MP3 format. They can
use USB cords to connect the
device to computers, so that
files can be
transferred. MP3s are audio
files that have been made
smaller by removing sounds
that the human ear cannot
hear. Many newer MP3 players
can also be used to view
images or movies, or play
games. The most well-known
MP3 player is the iPod.
8. A mobile phone is a little
portable radio telephone.
The mobile phone can be used to
communicate over long distances
without wires. It works by
communicating with a nearby base
station (sometimes called a "cell")
which connects it to the main phone
network. As the mobile phone moves
around, if the mobile phone gets too
far away from the cell it is connected
to, that cell sends a message to
another cell to tell the new cell to
take over the call. This is called a
"hand off," and the call continues
with the new cell the phone is
connected to. The hand-off is done
so well and carefully that the user
will usually never even know that the
call was transferred to another cell.
9. Many mobile phones are "smart phones" As well as making
voice calls, they can be used for other things:
•Sending and receiving emails, text and multimedia
messages
•Registering contacts
•Using calculator, currency, alarm, etc. functions
•Log on the Internet
•Playing games
•Taking photos and videos
