Transcript Mainframe Computer

Type of computer
Digital computer
Main frame
Computer
Micro Computer
Home
Analog computer
Super Computer
Hybrid Computer
Mini Computer
PC
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According to Size
According to Technology
According to Purpose
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Supercomputers
Mainframe Computers
Minicomputers
Workstations
Microcomputers, or Personal Computers
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Supercomputers are the most powerful
computers.
Supercomputers are widely used in scientific
applications such as aerodynamic design
simulation, processing of geological data.
They are used for problems requiring
complex calculations.
Because of their size and expense,
supercomputers are relatively
rare. Supercomputers are used by
universities, government agencies, and large
businesses.
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Mainframe Computers are usually slower, less
powerful and less expensive than
supercomputers.
A technique that allows many people at
terminals, to access the same computer at
one time is called time sharing.
Mainframes are used by banks and many
business to update inventory etc.
Mainframe computers can support hundreds
or thousands of users, handling massive
amounts of input, output, and storage.
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Mainframe computers are used in large
organizations where many users need access
to shared data and programs.
Mainframes are also used as e-commerce
servers, handling transactions over the
Internet.
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Minicomputers are much smaller than
mainframe computers and they are also much
less expensive.
They possess most of the features found on
mainframe computers, but on a more limited
scale.
They can still have many terminals, but not as
many as the mainframes.
Minicomputers may be used as network
servers and Internet servers.
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Workstations are powerful single-user
computers.
Workstations are also desktop machines.
They are, however, more powerful providing
processor speeds about 10 times that of PCs.
Workstations are used for tasks that require a
great deal of number-crunching power, such
as product design and computer animation.
Workstations are often used as network and
Internet servers.
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Microcomputers is the smallest, least
expensive of all the computers. Micro
computers have smallest memory and less
power, are physically smaller and permit
fewer peripherals to be attached.
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Microcomputers are more commonly known
as personal computers. The term “PC” is
applied to IBM-PCs or compatible computers.
Desktop computers are the most common
type of PC. Notebook (laptop) computers are
used by people who need the power of a
desktop system, but also portability.
Handheld PCs (such as PDAs) lack the power
of a desktop or notebook PC, but offer
features for users who need limited functions
and small size.
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Analog Computers
Digital Computers
Hydrid Computers
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Analog computers always take input in form
of signals.
The input data is not a number infact a
physical quantity like temp., pressure, speed,
velocity.
Signals are continuous
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These computers recognize data as a
continuous measurement of a physical
property ( voltage, pressure, speed and
temperature).
Example: Automobile speedometer,
Thermometer.
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These computers take the input in the form of digits
& alphabets & converted it into binary format.
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Digital computers are high speed, programmable
electronic devices.
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Signals are two level of (0 for low/off , 1 for
high/on).
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High Accuracy
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Examples: Computer used for the purpose of
business and education are also example of digital
computers.
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The combination of features of analog and
digital computer is called Hybrid computer.
Hybrid computer is a digital computer that
accepts analog signals, converts them to
digital and processes them in digital form.
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Eg:-computer used in hospitals to measure
the heartbeat of the patient.
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General purpose Computers
Special Computers
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A ‘General Purpose Computer’ is a machine
that is capable of carrying out some general
data processing under program control.
Refers to computers that follow instructions,
thus virtually all computers from micro to
mainframe are general purpose.
Even computers in toys, games and singlefunction devices follow instructions in their
built-in program.
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A computer that is designed to operate on a
restricted class of problems.
Use special purpose computer equipment to
obtain patient diagnostic information.
ECG machines
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