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learnedmooseupvalleyΗλεκτρονική - Συσκευές

7 Νοε 2013 (πριν από 3 χρόνια και 9 μήνες)

146 εμφανίσεις





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