Computer System information in simple language.

2. A computer is an electronic device, which accept data
and instructions. It processes the data to give meaningful
information.

3. Some of the characteristics of a computer are:
1.1. Speed
1.2. Accuracy
1.3. Diligence
1.4. Storage
1.5. Versatility

4. A computer can perform calculations at a very fast speed.
It can perform thousands of mathematical operation in a fraction of
second (i.e. in nanoseconds or even in picosecond.)
One nanosecond=10
-9
second
One picosecond=10
-12
second

5. A computer in considered to be a 100%
accurate machine. The calculations made by using a
computer are very accurate and almost error free. The
computer follows the principle of GIGO.(i.e. Garbage
in Garbage out)

6. A computer is free from tiredness or lake of
concentration etc. It can work continuously with
the same speed and accuracy.

7. A computer has huge amount of space to store
and information. Any data, which is stored in the memory
remains until and unless we do not destroy them.

8. Computer are capable of doing a variety of
jobs, e.g. logical problems, mathematical calculations,
chatting, sending and receiving e-mail, drawing pictures
etc. They do almost all types of jobs and can answer any
query.

9. 2.1.No intelligent quotient (IQ):-It can perform any task or
can give accurate result only if the program is error free. If an
error is present in the program or the entered data is not valid,
then it stops working or gives the garbage value.
2.2. No emotions:-If anyone runs a program, which is
destructive in nature, the computer will follow the instructions
without emotions.

10. Basically a computer system performs five different
operations. These are:-
3.1. Inputting
3.2. Storing
3.3. Controlling
3.4. Processing
3.5. Outputting

11. The process of entering data and instruction in the
computer system through input devices e.g. keyboard.

12. The process of saving data and instructions
for initial or for future additional processing as
and when required.

13. The process of directing the manner and
sequence in which all these operations are performed.

14. The process of performing mathematical,
relational or logical operation on data in order to
convert them into useful information.

15. The process of producing useful and meaningful
information or result for the user with the help of output
devices

16. Central Processing Unit
Control Unit
Arithmetic Logic Unit
Main memory
Second Storage
Unit
Input Unit Output Unit
System Unit
All major calculations and decisions are made inside the CPU.

17. Created by:
ABDUL KAYUM
Senior Teacher
Swami Vivekanand Govt. Model School,
Block- Parbatsar (Nagaur) 341512
E-mail: aqmansuri50@gmail.com