Early Computing devices

1. EVOLUTION OF
COMPUTERS

2. EVOLUTION
Gradual development of Something

3. Evolution of Human

4. Evolution of Computers

5. Points to think
1. Was there a computer
few hundred years
back?
2. If yes, then How did it
look like?
3. Then what about our
ancestors- what did they
use to count ?

6. ANCESTORS
Used Pebbles to count

7. EARLY
CALCULATING
DEVICES

8. 3000 BC ABACUS
• First Known calculating device
• Invented in China
• Addition, Subtraction, Multiplication & Division
Heaven
(2 beads)
Earth
(5 beads)

9. IMPORTANT QUESTIONS
• What is the first known calculating device?
• Where was Abacus invented?
• How many parts is Abacus divided into? And what are they?
• What basic operations can be performed using Abacus?

10. PASCALINE
• Invented by Blaise Pascal
• Also called as ‘Arithmetic Machine’
Used Gears
and Wheels

11. LEIBNIZ CALCULATOR
Improved Pascals
device. It could
perform
multiplication and
division also.
Invented by G.W. Leibniz

12. CHARLES BABBAGE
Difference Engine (1822)
Analytical Engine (1833)

13. CHARLES BABBAGE
• Considered as ‘Father of Computers’
• Invented a working model of mechanical
computer called Difference Engine (1822)
and Analytical Engine (1833)
Analytical Engine had five units- Input,
Output, Store, Mill and Control.
These units worked like modern
computers.
All the computers which are used
today are based on it.

14. Touch is input
Processing is done inside the phone
Opening / starting the app is
the output

15. LADY AUGUSTA LOVELACE
• Known for her work on Charles Babbage Analytical
engine.
• She is considered as ‘First Programmer’ who
suggested Binary Data storage (0s and 1’s)
GEORGE BOOLE
• Any problem could be solved by reducing them to a
series of questions having either positive or negative
answers.
• This theory was called BOOLEAN LOGIC -
fundamental principle for designing computer
circuitry.

16. TABULATING MACHINE
Dr. Herman Hollerith
Punched cards were used to
give the input and get the output

17. MARK-1
Invented by Howard Aiken
• First automatic sequence controlled calculator.
• It was capable of doing long computations
automatically

18. ENIAC & UNIVAC-1 (1951)
J. PRESPER ECKERT & JOHN MAUCHLY
ENIAC- Electronic Numerical Integrator And Computer
UNIVAC- Universal Automatic Computer
ENIAC-Consisted of 18000
vacuum tubes and was 1000
times faster than Mark-I
UNIVAC-This was the first
device which could handle
both numeric and text data.

19. MODERN COMPUTERS
Desktop TabletsLaptop

20. THANK YOU