1. Analog Computers
Analog computers are used
to process continuous data. Analog computers represent variables by physical
quantities. Thus any computer which solve problem by translating physical
conditions such as flow, temperature, pressure, angular position or voltage
into related mechanical or electrical related circuits as an analog for the
physical phenomenon being investigated in general it is a computer which uses
an analog quantity and produces analog values as output. Thus an analog
computer measures continuously. Analog computers are very much speedy. They
produce their results very fast. But their results are approximately correct.
All the analog computers are special purpose computers.
2. Digital Computers
Digital computer
represents physical quantities with the help of digits or numbers. These
numbers are used to perform Arithmetic calculations and also make logical decision
to reach a conclusion, depending on, the data they receive from the user.
3. Hybrid Computers
Various specifically
designed computers are with both digital and analog characteristics combining
the advantages of analog and digital computers when working as a system. Hybrid
computers are being used extensively in process control system where it is
necessary to have a close representation with the physical world.The hybrid system provides
the good precision that can be attained with analog computers and the greater
control that is possible with digital computers, plus the ability to accept the
input data in either form.
Classification of
Computers According to Size
1. Super Computers
Large scientific and
research laboratories as well as the government organizations have extra
ordinary demand for processing data which required tremendous processing speed,
memory and other services which may not be provided with any other category to
meet their needs. Therefore very large computers used are called Super
Computers. These computers are extremely expensive and the speed is measured in
billions of instructions per seconds.
2. Main Frame Computers
The most expensive,
largest and the most quickest or speedy computer are called mainframe
computers. These computers are used in large companies, factories,
organizations etc. the1. Analog Computers
Analog computers are used
to process continuous data. Analog computers represent variables by physical
quantities. Thus any computer which solve problem by translating physical
conditions such as flow, temperature, pressure, angular position or voltage into
related mechanical or electrical related circuits as an analog for the physical
phenomenon being investigated in general it is a computer which uses an analog
quantity and produces analog values as output. Thus an analog computer measures
continuously. Analog computers are very much speedy. They produce their results
very fast. But their results are approximately correct. All the analog
computers are special purpose computers.
2. Digital Computers
Digital computer
represents physical quantities with the help of digits or numbers. These
numbers are used to perform Arithmetic calculations and also make logical
decision to reach a conclusion, depending on, the data they receive from the
user.
3. Hybrid Computers
Various specifically
designed computers are with both digital and analog characteristics combining
the advantages of analog and digital computers when working as a system. Hybrid
computers are being used extensively in process control system where it is
necessary to have a close representation with the physical world.
The hybrid system provides
the good precision that can be attained with analog computers and the greater
control that is possible with digital computers, plus the ability to accept the
input data in either form.
Classification of Computers
According to Size
1. Super Computers
Large scientific and
research laboratories as well as the government organizations have extra
ordinary demand for processing data which required tremendous processing speed,
memory and other services which may not be provided with any other category to
meet their needs. Therefore very large computers used are called Super
Computers. These computers are extremely expensive and the speed is measured in
billions of instructions per seconds.
2. Main Frame Computers
The most expensive,
largest and the most quickest or speedy computer are called mainframe
computers. These computers are used in large companies, factories,
organizations etc. the mainframe computers are the most expensive computers,
they cost more than 20 million rupees. In this computers 150 users are able to
work on one C.P.U. The mainframes are able to process 1 to 8 bits at a time.
They have several hundreds of megabytes of primary storage and operate at a
speed measured in nano second.
3. Mini Computers
Mini computers are smaller
than mainframes, both in size and other facilities such as speed, storage
capacity and other services. They are versatile that they can be fitted where
ever they are needed. Their speeds are rated between one and fifty million instructions
per second (MIPS). They have primary storage in hundred to three hundred
megabytes range with direct access storage device.
4. Micro Computers
These are the smallest
range of computers. They were introduced in the early 70’s having less storing
space and processing speed. Micro computers of todays are equivalent to the
mini computers of yesterday in terms of performing and processing. They are
also called “computer of a chip” because its entire circuitry is contained in
one tiny chip. The micro computers have a wide range of applications including
uses as portable computer that can be plugged into any wall.
5. Laptop Computers
The smallest computer in
size has been developed. This type of small computers look like an office brief
case and called "LAPTOP" computer. The laptops are also termed as
"PORTABLE COMPUTERS." Due to the small size and light weight, they
become popular among the computer users. The businessmen found laptop very
useful, during traveling and when they are far away frm their desktop
computers. A typical laptop computer has all the facilities available in
microcomputer. The smallest laptops are called "PALMTOP".
Read more: Classification
of Computers | Types of Computer
http://www.friendsmania.in/forum/showthread.php?t=25530#ixzz23Iu7dikD mainframe
computers are the most expensive computers, they cost more than 20 million
rupees. In this computers 150 users are able to work on one C.P.U. The
mainframes are able to process 1 to 8 bits at a time. They have several
hundreds of megabytes of primary storage and operate at a speed measured in
nano second.
3. Mini Computers
Mini computers are smaller
than mainframes, both in size and other facilities such as speed, storage capacity
and other services. They are versatile that they can be fitted where ever they
are needed. Their speeds are rated between one and fifty million instructions
per second (MIPS). They have primary storage in hundred to three hundred
megabytes range with direct access storage device.
4. Micro Computers
These are the smallest
range of computers. They were introduced in the early 70’s having less storing
space and processing speed. Micro computers of todays are equivalent to the
mini computers of yesterday in terms of performing and processing. They are
also called “computer of a chip” because its entire circuitry is contained in
one tiny chip. The micro computers have a wide range of applications including
uses as portable computer that can be plugged into any wall.
5. Laptop Computers
The smallest computer in
size has been developed. This type of small computers look like an office brief
case and called "LAPTOP" computer. The laptops are also termed as
"PORTABLE COMPUTERS." Due to the small size and light weight, they
become popular among the computer users. The businessmen found laptop very
useful, during traveling and when they are far away frm their desktop
computers. A typical laptop computer has all the facilities available in
microcomputer. The smallest laptops are called "PALMTOP".