Types and Classification of computers (By Size & speed)
Three types of Computers with respect to Operational
Principle which are mention below.
1.
Analogue Computer
2.
Digital Computer
3.
Hybrid Computers
Classification of computers
(By Size & speed)
Computer
are mainly classified into four categories based on their processing speed,
size, storage capacity etc. there are mention below with detailed:
1.
Micro
Computers
2.
Mini
Computers
3.
Mainframe
Computers
4.
Super
computers
1. Micro or personal Computers:
Commonly known as personal computer (PC). In 1975 Ed Roberts, the
father of the microcomputer designed the first microcomputer, the Altair 8800
which was produced by Micro Instrumentation and Telemetry Systems (MITS). These computers are small and can perform all
of its inputs, processing, outputs and storage activities by itself. A personal
computer contains a processor, memory, and one or more input, output, and
storage device. Microcomputer are found in office, schools, homes etc. and designed
to be used by one person at a time.
2. Mini or Mid-range Computers:
It is larger and more powerful
than personal computers. It consists of two or more processors. They are used
in multi-user environments where more than one person is working on the
computer at the same time. Mini computers were introduced in 1960s. The DEC
PDP-12 minicomputer of 1969 is example of minicomputer.
3. Mainframe Computers:
It is larger computer in the term of size price power and speed. It
consists of multiple processors. It can handle a large number of users at the
same time. It was introduced in 1970s. Mainframes have the ability to run
multiple operating system and they are capable of storing large amount of
instructions and information. They are best suited for big organizations where
centralized data storage and processing are required. IBM 7094 mainframe
computer of 1970 is example of mainframe computer.
4. Super Computers:
Super computer is the biggest in size, most expensive in price and
powerful than any other computer. Super computer consist of thousands of
processors. They are built to process complex scientific calculations and its
main used in weather forecasting, nuclear research, launching of rockets
monitoring of satellites etc. its speed is generally measured in FLOPS
(floating point Operation per second).
Example of super computer’s
1. TITAN
Created by: Cray Inc
Installed at: Oak Ridge National Laboratory
Memory: 710 TB
Speed: 17.59 PFLOPS
Storage: 10 PB
Cost: US$ 97 Million
Rank: TOP500: #1 Nov 12, 2012
2. Tianhe-2
Created by: NUDT
Installed at: NUDT China
Memory: 1375 TB
Speed: 33.86 PFLOPS
Storage: 12.4 PB
Cost: US$ 390 Million
Rank: TOP500: #1, June 2013
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