Communication Evolution

 Sign and Symbol 

 Cave painting 

Cave paintings are paintings found on cave walls and ceilings, and especially refer to those of prehistoric origin.First found in Europe in 40000 year ago.Some theories hold that cave paintings may have been a way of communicating with others, while other theories ascribe a religious or ceremonial purpose to them.The oldest known symbols created with the purpose of communication through time are the cave paintings.

Smoke Signals

In 200BC the first saw the use of smoke signals as a form of communication in China. In this way, they were able to transmit a message as far away as 750 kilometres in just a few hours.In India, they use the smoke signal to show the sign of enemy. One short puff indicated the presence of an enemy group. If the signals were quickly repeated, it was a sign that the enemy was numerous and well armed.In general smoke signals are used to transmit news, signal danger, or gather people to a common area.

Drum

Drums are used for communication in central Africa in 6000 BC.These messages could actually travel up to 100mph.A word can have completely different meanings, depending on the intonation. That intonation relies on high/low tones. These tones can easily be duplicated by the drums.

The drum that use in communication

 Letter 

Letters have existed from the time of ancient India, ancient Egypt and Sumer, through Rome, Greece and China, up to the present days. A letter is a written message from one party to another containing information. Letters have been sent since around 7th or 8th centuries B.C. As communication technology has diversified, posted letters have become less important as a routine form of communication. For example, the development of the telegraph drastically shortened the time taken to send a communication, by sending it between distant points as an electrical signal.

 Telegraph 

Samuel Morse along with two physicists Joseph Henry and Alfred Vail who developed the first fully fledged electrical telegraph system.Telegraph is the long-distance transmission of textual opposed to verbal or audio) messages without the physical exchange of an object bearing the message.In the 19th century, the harnessing of electricity brought about the means to transmit signals via electrical telegraph. The advent of radio in the early 1900s brought about radiotelegraphy and other forms of wireless telegraphy. In the Internet age, telegraphic means developed greatly in sophistication and ease of use, with natural language interfaces that hide the underlying code, allowing such technologies as electronic mail and instant messaging.

 Telephone Call 

First patented in 1876 by Alexander Graham Bell and further developed by many other,the telephone was the first device in history that enabled people to talk directly with each other across large distances.A telephone is a telecommunications device that permits two or more users to conduct a conservation.Telephone converts sound,typically and most efficiently the human voice into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible from to its user.The word telephone has been adapted into the vocabulary of many languages.

 The first generation of Telephone

 Email Online 

Since 1993,email is a method of communication for exchanging digital messages.Modern email operates across the internet or other computer network.Some early email systems required that the author and the recipient both be online at the same time,in common with instant messaging.Today's email systems are based on a store-and-forward model.Email servers accept,forward,deliver and store messages.

 Mobile phone 

Motorola is the first company to produce the mobile phone.The first mobile phone was demonstrated in 1973,using a handset weighing around 2.2 pounds (1kg).In 1983,the DynaTac 8000x was be commercially available.Mobile phones are used for variety of purposes,including keeping in touch with family members,conducting business,and having access to a telephone in the event of an emergency.

DynaTac 8000x

The First of smartphone is IBM Simon.

In 1992,Simon was introduced many of the modern features.The Simon included a calender,address book,fax modem,calculator,notepad,an email app and simple games.It also had a completely touch-screen.

IBM Simon : The first Smartphone

Today Smartphone.

More advanced computing capability and connectivity than a common phone.Many function such as GPS,media player,digital camera,video camera,high-resolution touchscreen and web browsers.The mobile operating systems (OS) used by modern smartphone include Google's Android,Apple's iOS,Symbian,Microsoft's Windows Phone and others.

The example of Smartphone today.

 Social Networking. 

• In 2002, the launch of Friendster.
• In 2003, Myspace was launched.
• In 2004, Facebook was launched in Harvard-only exercise and remained a campus-oriented site before finally opening to the general public in 2006.
• In 2006,twitter was launched.
• In 2011 Google decided to launch their own social network Google+.

Social networking is now easier than ever to keep in contact with ald friends and it a new and interesting communication method.

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