2. INTRODUCTION
TYPES OF COMPUTERS
CLASSIFICATION OF COMPUTERS
CHARACTERISTICS OF COMPUTERS
WHAT COMPUTERS CAN DO
WHAT COMPUTER CAN’T DO
3. INTRODUCTION
A computer is a programmable machine . The two
principle characteristics of a computer are :
It responds to a specific set of instructions in a
well-defined manner .
It can execute a prerecorded list of instructions
(program) .SS
6. Classification of Computer
When we study on the basis of their
construction....
Size.
Performance.
Speed of execution.
Technological development.
Power of computational process.
Then classified into following types.....
7. MAINFRAME COMPUTER
Very large.
Expensive computer.
Process data at very high speed.... MIPS (
million instreaction in per second ).
Control data more then 1000 users.
Process hundred different program at a time.
Major manufacture compny.
uses.
9. Mini computer
Same as mainframe
Smaller in size
Less cost
Less speed and capacity
First interduced in 1960s
Major manufacturers compny
Uses
11. MICRO COMPUTER
Most common type of computer ( PC )
Easily to affordable
First manufacture compny
limited processer
singer user
90% people used in this computer
uses
13. Super computer
Artificial intelegence
Most power full and fastest
More expensive ( cost )
Very big in size
Processing speed
Uses
Manufacturer companies
15. CHARACTERISTICS OF COMPUTER
Word length :
A digital computer operates on binary digits – 0 and 1 .
The number of bitsthat a computer can process at a time in parallel
is called its word length .
16. Speed :
Computers can calculate at very highspeed, for example it can
execute millions of instructions per second .
17. Accuracy :
The accuracy of a computer systemis very high . Errors
in hardware can occur , but error detecting and
correcting techniques will prevent false result .
18. STORAGE :
Capability of storing and
retrieving hugeamounts of
data in a fast and efficient
manner is one of the
importantcharacteristic of
computer .
19. Automation :
Computer can perform every difficult task flawlessly
and execute the programs in the correct sequence .
20. Computer is a versatile machine . It is
capable of performing almost any
task , provided the task can be
reduced to a series of logical steps .
21. WHAT COMPUTER CAN DO?
Computer plays
an important role
in our daily life.
Now a days
computer is used
to perform
different tasks .
22. Complex calculations
Computer can
solve any type of
complex
calculation and
gives us right
answer and can
perform
arithmetic and
logical
operations in a
quick way.
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24. ENTERTAINMENT
Computer can also
be the source of
entertainment.
We can entertain
ourselves by
playing
Games
Watching Movies
Listening Music
etc.
25. In offices Computers can be used for
preparing letters , documents and reports.
In Hotels Computer are can be used for
advance booking of rooms , preparing bills and
providing enquiry services.
In Railways computer are can be used to do
rail reservation, printing of tickets and
preparation of reservation charts.
Doctors can use computers for diagnosing
illness and treatment of diseases.
27. . Computer is a
machine and
we have
made it so it
cannot do
such a tasks
which we can
do.
I can’t do really
28. Productivity :
Computer haven’t yet make all
our expectationas a
productivity improvement
tool . Sometimes it takes
longer time to do things as
compared to do manually .
