The document summarizes the history and generations of computers from the past to the future in 3 sentences: Past computers used early mechanical aids like the abacus and slide rule. The first electronic computers of the 1940s-1950s used vacuum tubes and were very large, expensive, and unreliable. Generations of computers since then have gotten smaller, cheaper, more powerful and efficient by transitioning to newer technologies like transistors, integrated circuits, personal computers, and future developments in areas like augmented reality, artificial intelligence, and cloud computing.

1. Computer genrations:Computer genrations:
Past,Present & FuturePast,Present & Future
By
Vijay V. Gadade

2. Past
Present
Future
Computer Generation

3. The History of
Computers
an electronic device which is capable of receiving
information (data) in a particular form and of performing a
sequence of operations in accordance with a
predetermined but variable set of procedural instructions
(program) to produce a result in the form of information or
signals.
What is computer

4. Abacus
 The abacus was an early aid
for mathematical
computations. Its only value is
that it aids the memory of the
human performing the
calculation. A skilled abacus
operator can work on addition
and subtraction problems at
the speed of a person
equipped with a hand
calculator (multiplication and
division are slower).

5. Slide Rule
 Napier's invention led directly to the slide rule,
first built in England in 1632 and still in use in
the 1960's by the NASA engineers of the
Mercury, Gemini, and Apollo programs which
landed men on the moon.

6. Blaise Pascal
 In 1642 Blaise Pascal, at age 19, invented the Pascaline
as an aid for his father who was a tax collector. Pascal
built 50 of this gear-driven one-function calculator

7. Charle’s Babbage
 By 1822 the English
mathematician Charles
Babbage was
proposing a steam
driven calculating
machine the size of a
room, which he called
the Difference Engine.

8. Hollerith’s Inovation
 By using punch cards,
Hollerith created a way
to store and retrieve
information.
 This was the first type
of read and write
technology

9. First Generation Computers
 The period of first generation was 1942-1954
The main features of First Generation are:
 Vacuum tube technology
 Unreliable
 Supported Machine language only
 Very costly
 Generate lot of heat
 Slow Input/Output device
 Huge size
 Need of A.C.
 Non portable
 Consumed lot of electricity

10. vacuum tube

11. Second Generation Computers
 The period of second generation was 1952-
1964.
The main features of Second Generation are:
 Use of transistors
 Reliable as compared to First generation computers
 Smaller size as compared to First generation computers
 Generate less heat as compared to First generation computers
 Consumed less electricity as compared to First generation computers
 Faster than first generation computers
 Still very costly
 A.C. needed
 Support machine and assmebly languages

12. Second Generation Computers
 Second generation
computers also saw a
new way data was
stored
 Punch cards were
replaced with magnetic
tapes and reel to reel
machines

13. Examples of Punch Cards

14. Third Generation Computers
 The period of third generation was 1964-1972.
The main features of Third Generation are:
 IC used
 More reliable
 Smaller size
 Generate less heat
 Faster
 Lesser maintenance
 Still costly
 A.C needed
 Consumed lesser electricity
 Support high level language

15. Fourth Generation Computers
 The period of Fourth Generation was 1972-1990.
The main features of Fourth Generation are:
VLSI technology used
Very cheap
Portable and reliable
Use of PC's
Very small size
Pipeline processing
No A.C. needed
Concept of internet was introduced
Great developments in the fields of networks
Computers became easily available

16.  The period of Fifth Generation is 1990-2004
 Robotics
 Neural networks
 Game Playing
 Development of expert systems to make decisions in real life situations.
 Natural language understanding and generation.
 Development of true artificial intelligence
 Development of Natural language processing
 Advancement in Parallel Processing
 More user friendly interfaces with multimedia features
 Availability of very powerful and compact computers at cheaper rates
Fifth Generation Computers

17. Sixth Generation Computers
Cloud Computing is a general term used to describe a
new class of network based computing that takes place
over the Internet,
 basically a step on from Utility Computing
 a collection/group of integrated and networked
hardware, software and Internet infrastructure
(called a platform).
 general public, enterprises, corporations and
businesses markets

18. Cloud Computing

19. Seventh Generation Computers
 The period of Seventh Generation is Future .
 Hololens
 Google Glass
 AR technology-(Agumented Reality)
 Rolltop
 Fujitsu Feb laptop concept

20. References
 Most of the information for this powerpoint
was obtained from the following web page:
 http://www.computersciencelab.com/Comput
erHistory/History.htm
 www.csc.com
 www.itechfuture.com
 www.tomsguide.com/US/augmented-reality-
future,news-19099.html
 www.cse.unr.edu