About the Computer PowerPoint - WordPress – www.wordpress.com

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


1492
-

Leonardo Da Vinci mechanical calculator.


1617
-

Logarithms, John Napier


1642
-

Blaise Pascal, mechanical adding machine.


1670
-

Gottfried Liebniz, multiplying calculator


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


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

History


1975
-

Microsoft.


1980
-
Apple conquers
50% of market.


1980
-
IBM accepts
Microsoft.


1981
-
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


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


The computer: advantages and disadvantages


Copyright@indianchild.com

04.09.07


http://hagar.up.ac.za/catts/learner/andres/telemat3.htm

04.09.07