THE ICT DEVELOPMENT by Michael Angelo https://padlet.com/mikeseok27/dqyyfu6zqs8q Four basic periods of development en-us 2017-06-24 15:59:40 UTC 2020-07-06 07:01:00 UTC hello@padlet.com #1. Pre-Mechanical Age 3000BC-1450A mikeseok27 https://padlet.com/mikeseok27/dqyyfu6zqs8q/wish/177346021 There's way of speaking and drawing picture but there is no real way to store knowledge. Based on the collective memory, 5000 years ago, the Sumerians in Mesopotamia devised a writing system -- Cuneiform. They used signs to express spoken sounds and words. 

In 2000 BC, the Phoenicians further simplified true alphabey for writing; and Greek adopted the Phoenicians alphabets and added vowels in it. So on, the Romans gave the letters Latin names which is the alphabet that we know today. 

1000 years later, the Greek folded this system and made a book wherein the Dictionary and the Encyclopedia are created as the first of information processing through the list of words, definitions and sorting infos alphabetically. 

700 yeats later, the development and the numbering system was featured. Actually, at 100 and 200 AD, the first calculator was invented as the first numerical information sorter -- the Abacus ]]> 2017-06-24 16:01:36 UTC https://padlet.com/mikeseok27/dqyyfu6zqs8q/wish/177346021 #2. Mechanical Age 1450-1840 mikeseok27 https://padlet.com/mikeseok27/dqyyfu6zqs8q/wish/177346087 At this period. Writng, books, and numbers were the basic building blocks that they used to understand their time and world. Information had to become more accessible to a large portion that started to produce machines that could help the humans for their works.

In 1450, Johan Gutenberg in Mairs, Germany invented the movalbe type printing press. Until then, everything was hand printed. 

Early 1600's. The slide rule was invented. A French mathematician invented the Pascal Pascaline, a machine to add and subtract numbers. 

150 years later. Charles Babbage invented a machine that could calculate numbers and print the results. 

1820- Difference Engine
1830- Analytical Machine: remarkably like today's computers. ]]> 2017-06-24 16:03:24 UTC https://padlet.com/mikeseok27/dqyyfu6zqs8q/wish/177346087 #3 Electromechanical Age 1840-1940 mikeseok27 https://padlet.com/mikeseok27/dqyyfu6zqs8q/wish/177346331 The discovery of ways by used of electricity that knowledge and informations could be translated into electrical impulses. 

Telegraph and the development of Morse Code where alphabets were translated into dots and clashes. 1876 Telephone was invented by Alexander Graham Bell. The discovery of electrical waves that travel through space helps the invention of the radio of Guglielmo Marconi -- telecommunication. ]]> 2017-06-24 16:13:25 UTC https://padlet.com/mikeseok27/dqyyfu6zqs8q/wish/177346331 #4. Electronic Age 1940-Present mikeseok27 https://padlet.com/mikeseok27/dqyyfu6zqs8q/wish/177346455 There is disagreement on who built the first electronic digital computer. 
United States and in Germany using vacuum tubes, much like what is in a TV to do high speed data processing
ENIAC, EDVAC, ADSAC and UNIVAC all invented.

Americans beat out the Brits with the UNIVAC, considered the world’s first commercial computer


FOUR GENERATINS OF DIGITAL COMPUTER:

First generation 1951-1958
Used vaccum tube as their main element. 

Second generatoon 1959-1963
AT&T Bell's laboratories discovered crystalline mineral called semiconductor used for the main element. 

Third generation 1964-1979
The integrated transistors were replaced into integrated circuits- thousands of tiny transistors were on a single silicon chip. 

Fourth generation 1979-Present 
The used of large scale integrated circuits and very large scale integrated circuits were containing over a million transistors one a single tiny chip and microprocessor that contains memory, logic and control circuit was on a tiny chip. 
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