What is Computer generation ?/Computer generation definition/Computer generation and types ?

The Generation of Computer System

A generation refers to the state of improvement in the development of a product. This term is also used in the different advancements in 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 have proportionally increased. New discoveries are constantly being developed that affect the way we live, work, and play. There includes computer generation explained with examples, what is computer generation short answer, generation of computer 1st to 5th, computer generation pdf, what are the 5 types of computer generation, how many generations of computer, 5 generations of computer, what are the 6 generations of computer, and computer generation history.

There are Various Types of Computer Generation they are listed below:

The First Generation of Computer (1946-1958)
The Second Generation of Computers (1959-1964)
The Third Generation of Computer (1965-1970)
The Fourth Generation of Computer (1971-Today)
The Fifth Generation of Computer

The First Generation: 1946-1958

(The Vacuum Tube Years)

The first-generation computers were huge, slow, expensive, and often undependable. In 1946two Americans, Presper Eckert, and John Mauchly built the ENIAC electronic computer which used vacuum tubes instead of the mechanical switches of the Mark I. The ENIAC used thousands of vacuum tubes, which took up a lot of space and gave off a great deal of heat just like light bulbs do. The ENIAC led to other vacuum tube-type computers like the EDVAC (Electronic Discrete Variable Automatic Computer) and the UNIVAC I (Universal Automatic Computer). The vacuum tube was an extremely important step in the advancement of Computers. Vacuum tubes were invented at the same time the light bulb was invented by Thomas Edison and worked very similarly to light bulbs. Its purpose was to act like an amplifier and a switch. Without any moving parts, vacuum tubes could take very weak signals and make the signal stronger (amplify it). Vacuum tubes could also stop and start the flow of electricity instantly (switch). These two properties made the ENIAC computer possible. The ENIAC gave off so much heat that they had to be cooled by gigantic air conditioners. However, even with these huge coolers, vacuum tubes still overheated regularly. It was time for something new.

The Second Generation: 1959-1964

(The Era of the Transistor)

The transistor computer did not last as long as the vacuum tube computer lasted, but it was no less important in the advancement of computer technology. In 1947 three scientists, John Bardeen, William Shockley, and Walter Brattain working at AT&T's Bell Labs invented what would replace the vacuum tube forever. This invention was the transistor which functions as a vacuum tube in that it can be used to relay and switch electronic signals. There were obvious differences between the transistor and the vacuum tube. The transistor was faster, more reliable, smaller, and much cheaper to build than a vacuum tube. One transistor replaced the equivalent of 40 vacuum tubes. These transistors were made of solid material, some of which is silicon, an abundant element (second only to oxygen) found in beach sand and glass. Therefore they were very cheap to produce. Transistors were found to conduct electricity faster and better than vacuum tubes. They were also much smaller and gave off virtually no heat compared to vacuum tubes. Their use marked a new beginning for the computer. Without this invention, space travel in the 1960s would not have been possible. However, a new invention would even further advance our ability to use computers.

The Third Generation: 1965-1970

(Integrated Circuits - Miniaturizing the Computer)

Transistors were a tremendous breakthrough in advancing the computer. However, no one could predict that thousands even now millions of transistors (circuits) could be compacted in such a small space. The integrated circuit, or as it is sometimes referred to as a semiconductor chip, packs a huge number of transistors onto a single wafer of silicon. Robert Noyce of Fairchild Corporation and Jack Kilby of Texas Instruments independently discovered the amazing attributes of integrated circuits. Placing such large numbers of transistors on a single chip vastly increased the power of a single computer and lowered its cost considerably. Since the invention of integrated circuits, the number of transistors that can be placed on a single chip has doubled every two years, shrinking both the size and cost of computers even further and further enhancing their power. Most electronic devices today use some form of integrated circuits placed on printed circuit boards--thin pieces of bakelite or fiberglass that have electrical connections etched onto them -- sometimes called a motherboard. These third-generation computers could carry out instructions in billionths of a second. The size of these machines dropped to the size of small file cabinets. Yet, the single biggest advancement in the computer era was yet to be discovered.

The Fourth Generation: 1971-Today

(The Microprocessor)

This generation can be characterized by both the jump to monolithic integrated circuits (millions of transistors put onto one integrated circuit chip) and the invention of the microprocessor (a single chip that could do all the processing of the full-scale computer). By putting millions of transistors onto one single chip more calculations and faster speeds could be reached by computers. Because electricity travels about a foot in a billionth of a second, the smaller the distance the greater the speed of the computer. However, what really triggered the tremendous growth of computers and their significant impact on our lives is the invention of the microprocessor. Ted Hoff, employed by Intel (Robert Noyce's new company) invented a chip the size of a pencil eraser that could do all the computing and logic work of the computer. The microprocessor was made to be used in calculators, not computers. It led, however, to the invention of personal computers, or microcomputers. It wasn't until the 1970's that people began buying computers for personal use. One of the earliest personal computers was the Altair 8800 computer kit. In 1975 you could purchase this kit and put it together to make your own personal computer. In 1977 the Apple II was sold to the public and in 1981 IBM entered the PC (personal computer) market. Today we have all heard of Intel and its Pentium Processors and now we know how it all got started. The computers of the next generation will have millions upon millions of transistors on one chip and will perform over a billion calculations in a single second. There is no end in sight for the computer movement.

Fifth Generation - Present and Beyond:

(Artificial Intelligence)

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. Artificial Intelligence is the branch of computer science concerned with making computers behave like humans. The term was coined in 1956 by John McCarthy at the Massachusetts Institute of Technology.

Artificial intelligence includes:

Games Playing: programming computers to play games such as chess and checkers.

Expert Systems: programming computers to make decisions in real-life situations (for example, some expert systems help doctors diagnose diseases based on symptoms).