09/06/2017
Evolution in communication
i)Human communication was revolutionized with the origin of speech approximately 500,000 years ago.
ii)Symbols were developed about 30,000 years ago.
iii)The next advancement in the history of communications came with the production of petroglyphs, carvings into a rock surface. It took about 20,000 years for homo sapiens to move from the first cave paintings to the first petroglyphs , which are dated to around 10,000 BC.
iv)Pictograms were used by various ancient cultures all over the world since around 9000 BC, when tokens marked with simple pictures began to be used to label basic farm produce, and become increasingly popular around 6000-5000 BC.
v)The invention of the first writing systems is roughly contemporary in with the beginning of the Bronze Age in the late Neolithic of the late 4000 BC.
vi)By 2700 BC Egyptian writing had a set of some 22 hieroglyphs to represent syllables that begin with a single consonant of their language.
vii)The history of telecommunication - the transmission of signals over a distance for the purpose of communication - began thousands of years ago with the use of smoke signals and drums in Africa, America and parts of Asia. In the 1790 s the first fixed semaphore systems emerged in Europe however it was not until the 1830s that electrical(later known as telecommunication) systems started to appear.
