Parts of a Computer:
CPU(Basic Unit):
All the inputs are stored, sorted, arranged and changed by a
computer. The device that helps a computer do so is called the processing device.
It is a very important part of a computer . The processing device in a computer
is known as Central Processing Unit (CPU).
Monitor:
A monitor looks like a TV
screen. It shows whatever you type on the keyboard or draw with the mouse.It is
a output device Monitors of the early years used CRT technology for
imaging, while modern computer monitors use LCD or even plasma screens. Monitors
are the most-used output devices of a computer.
Key Board:
The
keyboard is used for entering data into the computer system. It can type words,
numbers and symbols.
- Buttons
on the keyboard are called keys
- Whatever
you type on the keyboard can be seen on the monitor.
The keyboard and computer mouse are input devices. These are
used for performing various functions. A computer keyboard has 104 keys.
The keyboard has Letter keys, Number keys, Function keys, Arrow keys and
Special keys. Let us learn about a few more keys on a keyboard.
Symbols Keys :
These keys have special sings and symbols, which are to the
right of the letter keys such as: /, :, “,<, > etc.
Special Characters:
The special characters are also placed over the numbers on
the Number keys such as:!, @, #, $, %, * etc.You can use these as Symbol keys by pressing the
Shift key along with the Number
Function keys:
There are 12 functions keys from F1
to F12 at the top the keyboard. Each Function key has a different job to
perform.
Letter keys:
There are (A to Z) 26 letter keys in 3 rows.
First row (Q, W, E, R, T, Y, U, I, O, P) 10 letters. Second row (A, S, D, F, G,
H, J, K, L) 9 letters. Third row (Z, X, C, V, B, N, M) 7 letters. These are
middle on keyboard. And used to typing the words
Shift Key:
Shift Key is used with the other keys for different
purpose.
If you press and hold the shift key along with a Letter
key, it will type that letter in capital even when the Caps Lock is turned off.
For Example :
+ 1 Gives !
+ 3 Gives #
You can press the tab key to move the cursor several spaces
forward at once.
Escape Key:
The short form of Escape key is ESC. It is placed at the top
left corner in most of the keyboards. This key allows us to cancel an
operation.
Computer Keyboard
keys Glossary :
Keyboard: This is used
to enter data into the computer system.
Escape key: It allows
to cancel an operation.
Function key: Each of
these key have a different job to perform.
Shift key: It is used
with the other key for different purposes.
Symbol keys: These have
special signs and symbols.
Tab key: It moves the
cursor several spaces forward at once.
The mouse is a pointing device. You can give input to the
computer with the help of the mouse.Along with the keyboard if you also learn how to work with a
computer mouse, working on a computer would be easy.
- A computer mouse looks like a real mouse.
- It usually has two buttons and a wheel in mouse.
- The mouse is always kept on a mouse pad.
Clicking:
To press and release
the mouse button
Clicking means the pressing and releasing of the mouse
buttons. It takes place after pointing at an item.
Single –Click:
To release the left mouse button after pressing it once is
called single-click. A single-click is for selecting an item.
Double-Click: Double-Click:
To release the left mouse button after pressing it twice quickly
is called double-click. A double –click opens the selected item.
Right – Click:
To Release the right mouse button after pressing it
once, a list of Properties of the
selected item.
Computer Mouse Glossary :
Mouse: It is pointing device.
Clicking: Pressing and releasing the mouse
button to make the computer do some work.
Double-click: To press the left mouse button
twice quickly, before releasing it.
Right-click: To Press the right mouse button
once different purposes.
Single-click: To press the left mouse
button once before purposes.
A mouse pad is a thin rubber or plastic cushion of about 12 square inches or less with a plastic or textured surface. A mouse pad provides better traction and more precise cursor movement for a mouse than a desktop or other surface. Sometimes, a mouse pad includes a cushion for the user’s hand or wrist.It has different shapes.
Printer:
A printer prints the results of your work from the computer
screen on a sheet of paper. This is called a printout.
Computer Speaker:
A computer speaker is an output hardware device that
connects to a computer to generate sound. The signal used to produce the sound
that comes from a computer speaker is created by the computer's sound card.It has different shapes and size.
