Computers- then and now

Pascal's Pascaline

Sep 12, 1642

Blaise Pascal invented the Pascaline- a calculator that functioned using cogs. This was the first practical mechanical alculator and was capable of manual addition and subtraction.

Early computers

Period: Sep 12, 1642 to Sep 12, 1829

These early computers were quite big and were machines that would carry out repetitive tasks done by humans. These tasks do not require too much thinking.

Leibniz's invention

Sep 12, 1671

German mathematician Gottfried Wilhelm Leibniz cam up with a more advanced version of the pascaline, and instead of using cogwheels it used a stepped drum. This machine could add, subtract, multiply. divide, and even work out square roots.

Binary code

Sep 24, 1671

Leibniz also invented the binary number system which computers now use today. The binary number system is also known as base 2, where every time it comes to 2, 1 is carried. Computers use the base two number system instead of the base 10 (which we use today) because the circuits in a computer only have two states, on and off. The binary code is ueful because it also only uses two symbols , 1 and 0. Therefore, 1 reoresents on and 2 represents off.

Charles Babbages's difference engine

Sep 12, 1830

Charles Babbage and Ada Bryon design the difference engine, a machine with functions such as manual input and memory.
This machine can tabulate (chart) polynomial functions.
babbage design the machine but failed to build them, and the actual machine was constructed in London on 2002, 153 years after it was designed.

computers that were more than just calculators

Period: Sep 12, 1830 to Sep 12, 2000

Alan Turing's Colossus

Sep 12, 1936

Alan Turing was a famous mathmatician. He invented the Colossus, a giant machine, the height of a room, during the world war. This machine helped Britain greatly during the world war because it could decode the german enigma.
This machine is now being kept as a historical artifact at bletchly park, London.

World's first programmable computer

Sep 24, 1938

Konrad Zuse- german engineer, constructed the Z1, worlds first programmable binary computer.
On 1941, Konrad Zuse completed the Z3, which used electronical switches.

The ABC

Sep 24, 1939

Atanasoff Berry Computer- the ABC, a computer that was 1000 times more accurate than the differential analyzer.

The ENIAC

Sep 26, 1946

John Mauchly and J,Presper Eckert ivented the ENIAC, a computer that used vacuum tubes instead of relay switches.
The ENIAC stands for Electonic Numerical Integrator and Computer.

Integrated circuit

Sep 26, 1947

John Bardeen , Walter Brattain, William Shockley,working in bell telephone laboratories developed a new technology for the American public telephone system so the electiric signals could be amplified and carried further.They created a point contact transistor using semiconductors, ehich formed the basis of transistors and was better that the vacuum tube, because they were very small and reliable, and used no power at all unless in operation.

microprocessor 8080

Sep 26, 1974

Intel lauched a microprocessor known as 8080.

Apple ][

Sep 26, 1977

Picture source
Apple ][ launched. microcomputer
With disk drive unit, easy to store data.
50,000 sold.

Windows 1.0

Sep 27, 1985

Microsoft's first OS (operating system) was launched. it was called the Windows 1.0.

www- world wide web

Sep 26, 1989

Tim Berners Lee was a british computer scientist. In his days, people did not have shared information on the web and they had to log on to different computers to get each peice of information.
The only method to do this at the time was to connect many coomputers together. Tim saw a way to fix this problem using hypertext.

Google

Sep 15, 1997

Larry page and Sergey Brinn constructed Google, a now widely used search engine that can generate up to 7 million results in less than half a second.
Larry Page and Sergey Brinn met at Stanford university. They first came uo with a search engine called BackRub. Eventually it took up too much bandwidth, so they came up with Google, a wordplay on the mathematical term googol,which is a number with one followed by infinite 0s. They wanted to have a seemilngly infinite amount of info on the web.

Apple OS

Sep 27, 1997

Apple's first operating system, the mac OS, was launched.

The user revolution

Period: Sep 26, 2000 to Sep 26, 2015

First apple iPhone released

Jul 29, 2007

The apple iPhone is an invention that transformed the world of technoloy. At th etime, the iPhone was new because nothing like it was invented before, and many touchscreen smartohones from other companies were made.

Google SDC

Sep 30, 2011

The new google self driving car has proved that robots, or artificial intelligence, has become more and more advanced. The self driving car has proved that now robots can handle comlicated tasks that humans can do, and therefore is a great leap forward in robotics and computer programming.