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
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