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Analog Computer
Hybrid Computer
Digital Computer
In this computer represents data as numbers or separate unit’s.
Digital computer operates an decimal digits that represents either discreat data or symbols.
It takes input and give output in the form of numbers, letters and special characters.
This type computers are generally used for business and scientific data processing and also had a unique ability that is storing large quantities of data.
In this computer magnetic media is used as storage device.
This type of computer represents number by a physical quantity that is they assign numeric values by physically measuring some actual property, such as the length of an object, an angle created by two lines or the amount of voltage passing through a point in an electric circuit.
Analog computer derive all their data from some of measurement.
Though effective for some applications this method of representing number is a limitations of the analog computer.
The accuracy of the data used in an analog computer is directly related to the precision of its measurement
Hybrid computer combine the most desirable feature
of both analog and digital computer.
They have the speed of Analog Computer and the
accuracy of Digital Computer.
They usually used the special problems in which
input data derived from measurements is converted
in to digits and processed by computers.
Main frame Computer
Mini Computer
Micro Computer
Super Computer
Faster than Mini Computer and have larger memory
used in CPU intensive or I/O intensive job,like
In scientific and business applications and to
process high volume of data in large business
applications..
Example-IBM-370 and IBM-S/390,
DEC VAX-8800,
CPC-7600, UNIVAC-1110
Relatively faster and low cost compared to mainframes,
higher than PCs.
Design for real time dedicated multi user applications.
Example-IBM-17,
HP-3000
DECPDP-11
Slow, cheap significant computing power.
Use of INTEL chips. Single processor system
which can supports the simple tasks like
WP,ESS,DBMS etc
Example-PS 386, 486
PENTIUM (P-1, 2 ,3, 4)
Large in size and large memory compared to all other computers.
Ideal for high end computing applications involving large volume of data and intensive computing use-INTEL chips.
These computers are design for ultra high performance tasks such as encryption, cracking, creation of animation and for designing all knowledge based systems.
Example- IBMs Deep Blue,
CDC cyber family and
CRAY X-mp/26
Internet
IT Books of SMU