The Pascaline. The Stepped Reckoner The Analytical Engine.

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Presentation transcript:

The Pascaline

The Stepped Reckoner

The Analytical Engine

Tabulating Machine

The Mark I

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).

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

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

…and the transistor

Tubes to Transistors Relative size of each

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

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

Modern desktop computers – The CPU

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

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