The document discusses the five generations of computers from the 1940s to present. The first generation used vacuum tubes, were enormous in size, and had low processing speeds. The second generation used transistors, were smaller and more reliable. The third generation used integrated circuits, which were faster and cheaper to produce. The fourth generation used microprocessors, allowing computers to become smaller and more personal. Current computers are considered fifth generation, pursuing artificial intelligence and new technologies like quantum computing.
Computer has become a part of our life. Today along with calculations, their work area is very wide-supermarket scanners scan and calculate our grocery bill and also keep store inventory, automatic teller machines(ATM) helps us in banking transaction how the technology has developed and what its future course is To understand this first we should know about the different generations of computers.
The First electronic computer was designed and built at the university of pennsylvania based on vaccum tube technology. Vaccum tubes were used to perform logic operations and to store data. Generations of computers has been divided into five according to the development of technologies used to fabricate the processors, memories and I/O units.
The History of computer development is often referred to in reference to the different generations of computing devices. Each generation of computer is characterized by a major technological development that fundamentally changed the way computers operates, resulting in increasingly smaller, cheaper, more powerful and more efficient and reliable devices.
Nothing epitomizes modern life better than the
computer. Computers are such an integral part of our everyday
life now most people take them and what they have added to life
totally for granted. Even more so the generation who have grown
from infancy within the global desktop and laptop revolution
since the 1980s. The history of computer development is often
referred to in reference to the different generations of computing
devices. A generation refers to the state of improvement in the
product development process. This term is also used in the
different advancements of new computer technology. As new
technology was emerging, it was being used in the making of
computer. With each new generation, the circuitry has gotten
smaller and more advanced than the previous generation before
it. As a result of the miniaturization, speed, power, and com-
puter memory has proportionally increased. New discoveries are
constantly being developed that affect the way we live, work and
play.
Generation in computer terminology is a change in technology a computer is/was being used.
Initially, the generation term was used to distinguish between varying hardware technologies.
Nowadays, generation includes both hardware and software, which together make up an entire
computer system
Information technology (IT) is the use of computers to create, process, store, retrieve, and exchange all kinds of data[1] and information. IT forms part of information and communications technology (ICT).[2] An information technology system (IT system) is generally an information system, a communications system, or, more specifically speaking, a computer system — including all hardware, software, and peripheral equipment — operated by a limited group of IT users.
Although humans have been storing, retrieving, manipulating, and communicating information since the earliest writing systems were developed,[3] the term information technology in its modern sense first appeared in a 1958 article published in the Harvard Business Review; authors Harold J. Leavitt and Thomas L. Whisler commented that "the new technology does not yet have a single established name. We shall call it information technology (IT)."[4] Their definition consists of three categories: techniques for processing, the application of statistical and mathematical methods to decision-making, and the simulation of higher-order thinking through computer programs.[4]
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2. introduction
The first electronic computer was designed and built at the
University of Pennsylvania based on vacuum tube
technology. Vacuum tubes were used to perform logic
operations and to store data.
Generations of computers has been divided into five
according to the development of technologies used to
fabricate the processors, memories and I/O units.
3. • A generation refers to the state of improvement
in the development of a product. This term is
also used in the different advancements of
computer technology. With each new
generation, the circuitry has gotten smaller and
more advanced than the previous generation
before it. As a result of
the miniaturization, speed, power, and memory
of computers has proportionally increased. New
discoveries are constantly being developed that
affect the way we live, work and play
4. Transitional period
• I Generation : 1945 – 55
• II Generation : 1955 – 65
• III Generation : 1965 – 75
• IV Generation : 1975 – 89
• V Generation : 1989 to present
• VI Generation : Future
5.
6. FIRST GENERATION COMPUTERS
•During the period of 1940 to 1956 first generation of
computers were developed.
• The first generation computers used
vacuum tubes for circuitry and magnetic
drums for memory, and were often
enormous, taking up entire rooms.
• The vacuum tube was developed by
Lee De Forest. A vacuum tube is a device generally used to
amplify a signal by controlling the movement of electrons in
an evacuated space.
7. •Colossus was the
first electronic computer of this era. It's every aspect
was kept secret by British Government.
8. •First fully electronic digital
computer built in the U.S.
•Created at the University
of Pennsylvania
•ENIAC weighed 30 tons
contained 18,000 vacuum
tubes
•Cost a paltry $487,000
UNIVAC -1951
(Universal Automatic Computer)
9. CHARACTERISTICS
• First generation computers were based on vacuum
tubes.
• The operating systems of the first generation
computers were very slow.
• They were very large in size.
• Production of the heat was in large amount in first
generation computers.
• Machine language was used for programming.
• First generation computers were unreliable.
• They were difficult to program and use.
10. It is the Bendix G-15 General Purpose Digital
Computer, a First Generation computer introduced in
1956.
11.
12. The computers built in the 1950s and
1960s are considered the 2nd
generation computers. These
computers make use of the
transistors invented by Bell Telephone
laboratories and they had many of
the same components as the modern-
day computer. For instance, 2nd
generation computers typically had a
printer, some sort of tape or disk
storage, operating systems, stored
programs, as well as some sort of
memory. These computers were also
generally more reliable and were
solid in design.
13. TRANSISTORS
A transistor computer is a computer which
uses discrete transistors instead
of vacuum tubes. The "first generation"
of electronic computers used vacuum
tubes, which generated large amounts of
heat, were bulky, and were unreliable. A
"second generation" of
computers, through the late 1950s and
1960s featured boards filled with
individual transistors and . magnetic
memory cores they were first developed
in 1947 They. Transistors are most often
used to regulate the flow of an electrical
current and to switch electricity on and
off.
14. Throughout the early 1960's, there were a number of commercially
successful second generation computers used in business, universities,
and government from companies such as Burroughs, Control Data,
Honeywell, IBM, Sperry-Rand, and others. These second generation
computers were also of solid state design, and contained transistors in
place of vacuum tubes. They also contained all the components we
associate with the modern day computer: printers, tape storage, disk
storage, memory, operating systems, and stored programs. By 1965,
most large business routinely processed financial information using
second generation computers.
It was the stored program and programming languages that gave
computers the flexibility to finally be cost effective and productive for
business use. The stored program concept meant that instructions to
run a computer for a specific function (known as a program) were held
inside the computer's memory, and could quickly be replaced by a
different set of instructions for a different function. A computer could
print customer invoices and minutes later design products or calculate
paychecks.
15. Main Characteristics of a second
generation computer are..
Second generation computer machines were based on transistor technology.
Second generation computers were smaller as compared to the first generation
computers
The computational time of Second generation computers was reduced to
microseconds from milliseconds.
Second generation computers were more reliable and less prone to hardware
failure. Hence, such computers required less frequent maintenance.
Second generation computers were more portable and generated less amount of
heat.
ssembly language was used to program Second generation computers.
Hence, programming became more time-efficient and less cumbersome.
Manual assembly of individual components into a functional unit was still required
16. 3rd generation of
computers
The 3rd Generation computers replaced
transistors with “integrated circuits” or I.C. was
inverted by Jack Kilby as Texas instruments in
1958.
The 3rd generation computers using integrated
circuits proved to be highly reliable, relatively
inexpensive, and faster. Less human labour is
required at assembly stage.
17. Example of some main frame computers
developed during this generation are-
ICL(International computer limited.)
CDA(Control Data Corporation.)
18. Fourth Generation (1971-
Present)
• The microprocessor brought the fourth generation of
computers, as thousands of integrated circuits were
built onto a single silicon chip. What in the first
generation filled an entire room could now fit in the
palm of the hand. The Intel 4004 chip, developed in
1971, located all the components of the computer—
from the central processing unit and memory to
input/output controls—on a single chip.
19. Time Period: 1975 to Today
Technology: VLSI (Very Large Scale Integration)
Incorporated many millions of transistors &
electronic circuits on a single chip.
Size: Small as compared to first generation
computer.
Processing: Faster then first generation computer
20. • In 1981 IBM introduced its first computer for the
home user, and in 1984 Apple introduced the
Macintosh. Microprocessors also moved out of the
realm of desktop computers and become more
advanced.
• As these small computers became more
powerful, they could be linked together to form
networks, which also led to the development of the
Internet. Fourth generation computers also saw the
development of the mouse and handheld devices.
21. FIFTH GENERATION COMPUTERS
• Fifth generation computing devices, based
on artificial intelligence, are still in
development, though there are some
applications, such as voice recognition, that are
being used today. The use of parallel
processing and superconductors is helping to
make artificial intelligence a reality. Quantum
computation and molecular
and nanotechnology will radically change the face
of computers in years to come. The goal of fifth-
generation computing is to develop devices that
respond to natural language input and are
capable of learning and self-organization.
22. CHARACTERISTICS
• Less power consumption .
• High performance, lower cost and very
compact.
• Computers based on artificial intelligence are
available.
• Portable note book computers introduced .
• Memory chips up to 1 GB, hard disk drives up
to 180 GB and optical disks up to 27 GB are
available (still the capacity is increasing) .
23.
24. CONCLUSION
• As a result of the various improvements to the
development of the computer we have seen the
computer being used in all areas of life. It is a
very useful tool that will continue to experience
new development as time passes.
• Computers are used in various areas of our life.
Education, entertainment, sports, advertising,
medicine, science and engineering, government,
office and home are some of the application
areas of the computers.