1. Brief History of Computers

2. What was first computing device?
Abacus
Roughly 4000 years ago
Allowed you to do some rudimentary arithmetic

3. The real advances in Computing
Came in the 1800’s
Charles Babbage
A very well learned person
He has the same Lucasian Chair that Steven Hawkings has at University and Newton had too

4. Ideas from Charles
In 1812 he recognized the harmony between math and machines
Math involving repetition of simple tasks over and over again
He came up with the idea of the difference engine

5. The Difference Engine
The machine would be capable of storing a program, performing calculations and printing the result
In those days they didn’t have any silicon. They had it in the form of sand and they didn’t have computers.
He wanted to build a mechanical device powered with steam and do automatic calculations.

6. The Analytical Engine After abandoning the idea of DF
This machine was intended to be more powerful then the difference engine
It was designed to make conditional decisions
Based on one calculation it would generate more calculations

7. What about his inventions?
Funny thing is that neither of those devices was ever built during his life time.
Later the difference engine was built from a bunch of rotors and motors

8. The first programmer Ada Byron
She was the daughter of Lord Byron who was the famous English poet
She was really taken by the designs of Charles Babbage's design
She devised programs for a computer that doesn’t exist 100 years before it was invented

9. Someone needs to figure out
Write programs for computers that don’t exist

10. First prototype of computing devices
1930’s – 40’s prototypes
1946 ENIAC (Electronic Numerical Integrator and Calculator
Big ware house and few tons
First large scale electromagnetic processing device

12. Generations of Computers
First Gen –
ENIAC was one of the first machines.
It was used to calculate ballistic trajectories
Weighed 30 tones
Used vacuum tubes that would light up just like a bulb

13. Second Generation 1956 Used transistors which replaced vacuum tubes
Computer size was reduced massively

14. Third generation
1950
IC (Integrated Circuit) was developed by Jack Kilby and Robert Noyce

15. Fourth Genration 1971 First affordable microprocessor came out
Intel 4004

16. What is exciting? Its just been 42 year since the first MC came out
You to be alive in this accelerating phase.
With all the technologies coming around.
You’re going to be doing this in the next 42 years