CLASSIFICATION OF COMPUTER

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Nov 7, 2013 (3 years and 5 months ago)

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CLASSIFICATION OF COMPUTER


BASEDE ON FUNCTIONAL CAPABILITIES SUCH AS SPEED, STORAGE
CAPACITY, SIZE, ETC


In previous class we discussed that Based on functional capabilities we divide the
computer into 4 major categories:
-


1. Microcomputer


2. Minicomput
er


3. Mainframe


4. Supercomputer


We also discussed about Microcomputer and Minicomputer. Now in this class we
will be discussed about Mainframe and Supercomputer.


Mainframe





Main
frame system are computer system that are mainly used for handling
the processing of bulk of data and information of organization such as bank,
insurance companoies
, hospitals, railways,

etc
.



They are also used in such a environments where a large number
of users
need to share a common computing facility

such as in research groups,
educational institutional, engineering firms etc.



A typical configuration of mainframe computer consist of



1. Host Computer (Processor), Back
-
End and Front
-
end Computer


I.

Hos
t Computer has multiple CPU and carries out most of the
computations and has direct control over all the other computer.

II.

Back
-
End computer used to handle I/O operation thus relieving the
host computer of locating a particular I/O device and
transferring

da
ta to or from it.

III.

Front
-
End computer used for handling communications to and from
all the user terminal connected to computer

system thus relieving the
host computer of communications related processing requirement.


2. Console


One or more console termina
l
s

are also located in system room.
These

terminals are directly connected to the host processor and are mainly used by
the system admin to monitor the health of system or to perform some system
administrative activities such as changing the configuration
,

etc
.


3. Storage Device


For large volume data storage
,

mainframe has several magnetic disk

drives
which are directly connected to back end computer.

All data to and from these magnetic disk are accessed by host computer via
back
-
end computer.


4.

User Te
rminal


The primary means of accessing the system by the user is the user terminals,
which are used by users to write, test and execute their programs


5. Output Device


User terminals serve the purpose of soft copy output device. However for
hard copy out
puts, a mainframe has several printers and plotters connected
to back
-
end computer.



Mainframe computer are much bigger and several times more expensive
than minicomputers.



Supercomputer





Supercomputers are the most powerful computer and most expensive
computer available at given time.



They are primarily used for processing complex scientific calculation that
require enormous processing power like
aerodynamic design simulation,
proc
essing of geological data
, weather

forecasting, simulation of airflow
around an aircraft, crash simulation of the design of an automobile.



The major difference between supercomputer and all other computer is that
supercomputer primarily addresses “
Process
or
-
Bound Application
” whereas
others addressed “
Input/output Bound
” Applications.



Supercomputer use multiprocessing and parallel processing technologies to
solve the complex problem faster, hence they are also called as Parallel
Computer.



Speed is measu
red in Gigaflop or teraflops.



PARAM series computers are an example of supercomputer developed by C
-
DAC, Pune.