What is a computer? Programmable device Mid 20th century Big role in the society today Digital cameras, electronics, kitchen Hi-fi components Cars and.

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Presentation transcript:

What is a computer? Programmable device Mid 20th century Big role in the society today Digital cameras, electronics, kitchen Hi-fi components Cars and other vehicles Medical devices such as hearing aids, Mobile phones Children's toys.

history 2400 years BC- Abacus 500 years BC- zero established in India Leonardo Da Vinci mechanical calculator Logarithms, John Napier Blaise Pascal, mechanical adding machine Gottfried Liebniz, multiplying calculator

History Joseph- Marie Jacquard, loom mass produced calculator, Thomas de Colmar Charles Baggage ”Difference engine” “Father of Computer Science”, was George Boole

History Herman Hollerith,“The Hollerith Tabulating Company” Today IBM. 1940’s-First programmable electronic computers Worlds first operational computer. 1980s- IBM 360c(1964) $100 billion. Standard institutional mainframe computer Bill Gates

History Microsoft Apple conquers 50% of market IBM accepts Microsoft IBM PC, ”Basic” 1984-Apple Macintosh

How a computer works: Hardware Software Input

How a computer works: Booting up Turn on the computer- input Software programs tells CPU to start up certain programs and turn on some hardware devices. Choose a software- input Browse the internet, usage of browser software. Print- hardware

How a computer works: Booting up: Input- turn on the computer Software tells CPU to start up certain programs. Clicking on icon- software and input. Browsing the internet, browser software. Print- hardware.

Advantages Fast and without errors Information source Working tasks and homework from home Simplifies our everyday life

DISADVANTAGES Computer comes before interaction with others Missing privacy Sexual offenders on line Helps plagiarism

Thanks for listening! Mariama Ndure Caroline Jærnes Julie Grønneberg Bech Iben Rak Haugen

Sources: The Oxford Dictionary What is a Computer History of the computer How the computer works: 29/09/07 The computer: advantages and disadvantages