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Among the symbols used, there are cave paintings, petroglyphs, pictograms and ideograms. Writing was a major innovation, as well as printing technology and, more recently, telecommunications and the Internet. The oldest known symbols created for communication were cave paintings, a form of rock art. A pictogram (pictograph) is a symbol representing a concept, object, activity, place or event by illustration. Pictography is a form of proto-writing whereby ideas are transmitted through drawing. 

# data[].attributes.subject
Among the symbols used, there are cave paintings, petroglyphs, pictograms and ideograms. Writing was a major innovation, as well as printing technology and, more recently, telecommunications and the Internet. The oldest known symbols created for communication were cave paintings, a form of rock art. A pictogram (pictograph) is a symbol representing a concept, object, activity, place or event by illustration. Pictography is a form of proto-writing whereby ideas are transmitted through drawing. 

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Pre-electric
Telegraph
Landline telephone
Phonograph
Radio and television
Fax
Mobile telephone
Computers and Internet -

1946 - The University of Pennsylvania introduces ENIAC, the first programmable, electronic, general-purpose digital computer

1949 – Claude Shannon, the "father of information theory", mathematically proves the Nyquist–Shannon sampling theorem.

1957 – Gordon Gould invents the laser and the optical amplifier.[22]

1965 – First email sent (at MIT).[23]
Exhibition space at Rupriikki Media Museum in Tampere, Finland

1966 – Charles Kao realizes that silica-based optical waveguides offer a practical way to transmit light via total internal reflection.

1969 – The first hosts of ARPANET, Internet's ancestor, are connected.[24]

ARPANET access points in the 1970s

1971 – Erna Schneider Hoover invent a computerized switching system for telephone traffic.

1971 – 8-inch floppy disk removable storage medium for computers is introduced.[25]

1973 – Optelecom, Inc. delivers the first operational optical communications system under an ARPA contract to the US Army Missile Command, and the first commercial fiber optic system to Chevron.[26]

1975 – "First list servers are introduced."[25]

1976 – The personal computer (PC) market is born.

1977 – Donald Knuth begins work on TeX.

1981 – Hayes Smartmodem introduced.[27]

1983 – Microsoft Word software is launched.[28]

1985 – AOL is launched.

1989 – Tim Berners-Lee and Robert Cailliau build the prototype system which became the World Wide Web at CERN.

1989 – WordPerfect 5.1 word processing software released.[27]

1989 – Lotus Notes software is launched.[29]

1991 – Anders Olsson transmits solitary waves through an optical fiber with a data rate of 32 billion bits per second.

1992 – Internet2 organization is created.

1992 – IBM ThinkPad 700C laptop computer created. It was lightweight compared to its predecessors.[27]

Screenshot of NCSA Mosaic browser1993 – Mosaic graphical web browser is launched.[29]

1994 – Internet radio broadcasting is born.

1996 – The first Dense Wave Division Multiplexing (WDM) system was installed by Ciena Corp.[30] WDM subsequently became the common basis of all telecommunications networks[31] and a foundation of the Internet.

1996 – Motorola StarTAC mobile phone introduced. It was significantly smaller than previous cellphones.[27]

1997 – SixDegrees.com is launched, the first of a number of early social networking services

1999 – Napster peer-to-peer file sharing is launched.[27]

2001 – Cyworld adds social networking features and becomes the first of a number of mass-market social networking service

2003 – Skype video calling software is launched.

2004 – Facebook is launched, becoming the largest social networking site in 2009.

2005 – YouTube, the video sharing site, is launched.

2005 – Reddit is launched.

2006 – Twitter is launched.

2007 – iPhone is launched.

2009 – WhatsApp is launched.

2010 – Instagram is launched.

2011 – Snapchat is launched.

2015 – Discord is launched.

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1.1 - EVOLUTION OF COMMUNICATION - STONE AGE TO MODERN AGE