1. The Pascaline

2. The Stepped Reckoner

3. The Analytical Engine

4. Tabulating Machine

5. The Mark I

7. The real power of a computer CPU (Decision-making or processing) Input Output Memory (storage) Data flows from the input to the memory. The CPU accesses the memory, Makes decisions, and then returns its decisions to memory. This decision Is then output to the user. The Central Processing Unit is the part of the computer that makes all the decisions (does all the calculations).

8. In your opinion, what are the some of the most important inventions of all time?

9. The most important inventions of all-time Printing press Clock or watch Lightbulb (electricity) Telephone Car Wheel Plow …a controversial one…

10. …and the transistor

11. Tubes to Transistors Relative size of each

12. The integrated circuit – many transistors (switches) in one package

13. Mainframes These are just terminals (or “dummies”). No processing is done here The mainframe does all the calculations and decision- making

14. Modern desktop computers – The CPU

15. Where are computers going… The iPad The iPhone Quantum computing…. (whatever that is)