~*Happy New Year 2023*~
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~~*~~
A SMART MACHINE
THE COMPUTER - A MACHINE
Machines are made by us to make our work easy to do.
A computer is a very useful machine. We can listen to
music, watch movies, type, play games, draw, and solve sums with the help of a
computer.
The parts of a computer need electricity to work.
Hence, a computer is called an electronic machine.
HUMANS AND COMPUTERS
A computer is a smart machine. It can do many things
that we can do. But, there are some differences between computers and us:
A computer can work very fast. Humans cannot work as
fast as a computer.
A computer does not make a mistake. Humans can make
mistakes.
A computer never gets tired. But humans do get tired
after some time. A Computer can do the same work over and over again. It never
gets bored. Humans may sometimes get bored doing the same work over and over
again.
A computer does not have any feelings, and cannot take
decisions. Humans have feelings and can take decisions.
Thus, you can see that there are many differences
between computers and us humans.
TYPES OF COMPUTERS
Computers are of different types and come in different
sizes.
The computers that are kept on a desk are called
desktop computers.
Some desktop computers come with a separate CPU
cabinet, a monitor, and a keyboard. All these are connected to the CPU cabinet.
Nowadays, there are also desktop Computers that have a
monitor with all the parts of the CPU cabinet inside it.
Small computers that can be kept on our laps are
called laptops.
A laptop can be carried around by one person. It can
also work on a battery.
Smaller computers that fit into the palm of our hand
are called palmtops.
Some of the palmtops can be carried around in our
pockets too. They also work on batteries.
A tablet computer is smaller than a laptop, but larger
than a palmtop.
A tablet computer has a touch screen. You can use your
fingers or a Pen like device to work on a tablet computer.
All of these computers are also called personal
computers (PCs). They are personal because they can only be used by one person
at a time.
STARTING AND SHUTTING DOWN A COMPUTER
A computer is a machine and, like a television or a
fridge, runs on electricity.
Therefore, it is an electronic machine. Just like a
television or a fridge, a computer too can be switched on and off. This is also
called starting and shutting down a computer.
Let us learn the correct way to start and shut down a
computer.
Starting a computer
There is a proper way to start a computer.
The steps are:
Step 1: Switch ON the power supply.
Step 2: Switch ON the UPS.
Step 3: Switch ON the power button on the CPU cabinet
(also called the CPU box).
Step 4: Switch ON the monitor.
Note: The power supply is usually kept ON to keep the
UPS charged.
A screen called the desktop appears. You can see small
pictures on it. These are called icons.
Shutting Down a Computer
It is important to learn how to switch off the
computer properly. Lets see what the steps are:
Step 1: Click START button.
Step 2: Click SHUT DOWN button.
Step 3: The messages logging off and then shutting
down will appear. In few seconds monitor turns blank.
Now switch off the power button on the monitor.
Step 4: Switch OFF the UPS.
Step 5: Switch OFF the power supply.
Note: The power supply is usually kept ON to keep the
UPS charged.
COMPUTER MANNERS
Do not bend forward while working at the computer. Sit
at least an arm's length away from the computer monitor.
TRICKY TERMS
Electronic machine: Any machine that works on
electricity.
PC: Personal computer that is designed to be used by
only one person at a time.
Laptop: Personal computer that can be kept on our
laps.
Palmtop: Smaller than a laptop and can fit into the
palm of our hand.
Tablet: A computer that is smaller than a laptop, but
larger than a palmtop.
Monitor: The computer screen that displays words and
pictures.
Desktop: The first screen that appears when a computer
is switched ON.
Icons: Small pictures that appear on the desktop when
a computer is switched on.
Shut down: To turn off the computer safely.