1. Etymology:
From the verb computare “to count, sum up”. The word computer referred to a person’s occupation of counting and calculating in 1646; it then referred to a mechanical calculating machine in 1897.
COMPUTER
The modern meaning, “programmable digital electronic computer” was used from 1945.

2. The “dad” of the computer…
The first electronic calculator was invented by Konrad Zuse, the so-called “dad” of the computer. He was a young German teacher who, in 1936, built the “Z1”, the first machine to be called a “computer”.

3. Who was he…?
Zuse entered in the Technische Hochschool of Berlin in 1927, where he took courses in civil engineering. From there he began to take interest in building machines, a passion that led him to build the Z1.

4. Where…?
In Germany during 1936, Konrad Zuse undertook the construction of a machine that would be able to perform quick calculations, but endowed with a certain versatility of use.
Germany
In USA The ENIAC ( Electronic Numerical Integrator And Computer ) was the first electronic computer in history. In Great Britain it was invented a computer to deciphering the secret messages of the Germans during WW2. The name of this computer was COLOSSUS.

5. In the world…in the meantime…
When the first mechanical calculators were invented the Second World War had just started (1939).
At the same time Adolf Hitler gave a hand to help Francisco Franco slaughter Guernica, in Spain.
In Germany the 11th Olympic Games started.

6. Gilbert coined the term electricity from the Greek word “elecktra”.
Pascal invented a machine, the Pascaline that can add, subtract and carry between digits.
Gilbert coined the term electricity from the Greek word “elecktra”.
1600
1642
300 B.C.
1623
The first abacus used by Babylonians
Wilhelm Schickard invented the first workable mechanical calculator.

7. Charles Babbage’s Difference Engine The first telegraph was built.
1774
1821
1674
1820
1898
ALCATEL, a company that built software and hardware, was founded.
The first commercially successful and useful calculating machine was invented by Thomas de Colmar.
Leibnitz’s machine that can add, subtract, multiply and divide automatically

8. Zuse finished the Z3, a fully operational calculating machine
Grace Hopper programmed the MARK II
1941
1945
1936
1943
1946
Konrad Zuse created the Z1, one of the first binary digital computers.
Colossus was planned by Touring and some students
ENIAC computer was completed.

9. The EDVAC, the first electronic computer, was invented.
Doug Engelbart invented and patented the first mouse.
1952
1963
1948
1957
1972
The United States created the new agency ARPA to keep the USA military technology ahead of its enemies.
ARPA was renamed DARPA
Magnetic drum memory was created by Booth

10. The Personal Computer was built. Microsoft was founded by Bill Gates.
1977
1974
1975
1980
Microsoft licensed Unix and started to develop a PC version, XENIX.
Apple became Incorporated.

11. The first mini- notebook was invented.
The first Palm Computing was created.
1999
2005
1984
2000
2007
Microsoft Windows 2000 was released on February.
Iphone, the most technology machine, was invented.
The first notebook was introduced.

12. Effects now… We can… … collect and store much more data
… complete work more quickly and efficiently
… create video and montages with a big variety of special effects
… pass the time by playing computer games
… make calculations and graphics

13. Computer and The Teens
In our lives the computer has meant a big step. So it has improved our lives and now the teenagers spend more time on the computer than when the P.C. hadn’t been invented, unfortunately they don’t socialise so much.
In fact they spend most of their free time on the computer, on the phone and watching TV.