PEOPLE
By: Cars/Ships/Trains/Bicycles/Motor Bicycles/Buses/Air Baloons/Foot/Animals (hourses)
GOODS
Goods like: Food/Objects/Materials/Electricity/Coal/Gas/Wind etc.
DATA
Data like: Information/Senses(sight,hearing,taste,smell,touch)/Signals ( we can get it with voice or visually)
What types of signals do we actually know?
1)MORSE CODE
Morse code is an alphabetic code of long and short sounds, originally transmitted by telegraph. Each letter in the alphabet has a corresponding sound or series of sounds unique to it. The long sounds are referred to as dashes, while the short sounds are dots. Varying lengths of silence denote spaces between letters or words.
To make a dot on a telegraph, the telegraph key or switch was depressed and allowed to rapidly spring back. To make a dash the key was held down longer before allowing it to rebound. Thus messages were sent by tapping the key in a rhythm of coded letters. Messages were received via a radio transceiver, sounding like dots and dashes of static.
American Samuel Finely Breese Morse (1791-1872) invented the telegraph and Morse code in 1836. The code was successfully tested on 24 May 1844, when Morse himself sent the first message between Washington DC and Baltimore: "What has God wrought?"
The most well known Morse code phrase is SOS (save our souls). SOS was chosen because the code for it -- 3 dots followed by 3 dashes followed by 3 dots -- is unmistakable as anything else and recognizable even to those who do not know Morse code.
1)LIGHT SIGNALS
Aviation Light signals /Traffic Light Signals etc.
By Ksenia Konstantinova
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