3. 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.

4. history 2400 years BC- Abacus 500 years BC- zero established in India 1492- Leonardo Da Vinci mechanical calculator. 1617- Logarithms, John Napier 1642- Blaise Pascal, mechanical adding machine. 1670- Gottfried Liebniz, multiplying calculator

5. History 1801- Joseph- Marie Jacquard, loom. 1820- mass produced calculator, Thomas de Colmar. 1822-Charles Baggage ”Difference engine” “Father of Computer Science”, was George Boole

6. History 1890- Herman Hollerith,“The Hollerith Tabulating Company” Today IBM. 1940’s-First programmable electronic computers. 1944- Worlds first operational computer. 1980s- IBM 360c(1964) $100 billion. Standard institutional mainframe computer 1971- Bill Gates

7. History 1975- Microsoft. 1980-Apple conquers 50% of market. 1980-IBM accepts Microsoft. 1981-IBM PC, ”Basic” 1984-Apple Macintosh

8. How a computer works: Hardware Software Input

9. 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

10. 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.

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

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

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

14. Sources: The Oxford Dictionary What is a Computer www.wikipedia.org History of the computer http://www.computersciencelab.com/ComputerHistory/History.htm http://www.goldenink.com/computersandnetworks.shtml http://www.pbs.org/nerds/timeline/ How the computer works: http://www.cs.uri.edu/ 29/09/07 http://www.cs.uri.edu/ The computer: advantages and disadvantages Copyright@indianchild.com 04.09.07 Copyright@indianchild.com http://hagar.up.ac.za/catts/learner/andres/telemat3.htm 04.09.07 http://hagar.up.ac.za/catts/learner/andres/telemat3.htm