1. What
is Computer?
The word 'Computer' originated from Latin word 'Computare' it means to calculator or count. An electronic device which can accept data, process them and give the processed output as information to the user. It was developed by Charles Babbage in 1822 (difference) engine.
2. Full
form of Computer?
C =Common
O =Operating
M =Machine
P =Purpose
U =Useful
T =Technology
E = Education
R =Research
3. Parts
of Computer.
v Monitor
v CPU
v Keyboard
v Mouse
v speaker
v casing
v mother
board
v RAM
v CPU
Chips (Central processing unit)
v CPU
fan
v Hard
Disk
v SMPS
(Switch mode power supply)
v DVD
Drive (Digital versatile/video disk)
4. Main
three parts of computer.
I.
Input device
II.
CPU (Central processing unit)
III.
Output device
I.
Input device: - An input device is any
hardware device that sends data to the computer, without any input devices, a
computer would only be a display device and not allow user to interact with it
much like a TV. Some popular input devices are: Key board, mouse, scanner,
microphone, digital camera, pen drive, CD ROM. An example of an input device.
II.
CPU (Central processing unit) :-CPU is
alternatively referred to as the brain of the computer processer, central
processer or the CPU (pronounced as C-P-U) was first developed at Intel with
the help of Ted Hoff in the early 1970's and is short for central processing
unit. The computer CPU is responsible for handing all instruction it receive
from hardware software running on the computer. CPU has two panels.
A. Show
panel
B. Back
panel
A. Show
panel
® Start
button:- It helps to press start computer.
® Re-Start
button:- It helps to press automatic re-start computer.
® USB
port (universal serial bus):- it helps to connect all USB versions like USB pen
drive, USB keyboard, mouse, data cable, printer etc.
® Audio
port:
a) Pink
color:- it helps to connect microphone.
b) Blue
color:- it helps to connect speaker.
B. Back
panel
® SMPS
port:-it helps to connect current power.
® Ps/2
version
a) Blue
color:- it helps to connect key board.
b) Green
color:- it helps to connect mouse.
® Communication
port:- it helps to connect internet
CDMA.
® VGA
(video graphic adaptor):- it helps to connect monitor cable so that we can see
display on screen.
® USB
…………………………
® RJ/45
(Register jack):- it helps to connect LAN (local area network) trough the
tower.
® Audio
port:
1. Pink
color:- it helps to connect microphone.
2. Blue
color:- it helps to connect speaker.
3. Green
color:- it helps to connect record data.
® Printer:-
it helps to connect printer cable so that we can print out document.
III.
Output device:- output device means
display information and a screen creates printed copies, generates sound,
monitor, printer and speaker are example of output device.
5.
Characteristics of computer
Ø Accuracy ;'4tf
Ø Speed a]u
Ø Automatic ;f]rlnt
Ø Versatile kl/jt{glzn, lalat
sfo{
Ø Diligent nuglzn
Ø Storage ef08/0f
6.
Generation of computer
|
Generation |
technical used
|
period |
speed |
years |
|
1st
|
Vacuum tubes |
1946-1958 |
Mili second |
12 |
|
2nd
|
transistor |
1959-1964 |
Mili second |
5 |
|
3rd |
IC (silicon
chips) |
1965-1974 |
macro second |
9 |
|
4th |
Micro-chips |
1975-1990 |
nano second |
15 |
|
5th |
Bio-chips
(processer) |
1990 xfn ;Dd |
Pico second |
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