Computers Tell the train driver any emergency like fires or passenger alarm button, also make sure everyones paid for their ticket, and that its valid. Also things like its distance from the trains in front and behind.
trains were scheduled with train movement charts
Trains Play a big role in South America's transportation of goods.
The role of a trackman in a railway system is to control the flow of trains and their directions. It is their responsibility to ensure trains are travelling on the correct tracks.
Mostly (and most directly) by control of the signaling systems.
Computers are now-a-days play a major role in entertaining the people.
Ships do
Ships do
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Magnetic Levitation (MagLev) trains, hard disk drives for computers, vacuum cleaners, and several others
abacus is one of the device that played role of computers in ancient times.
It tells you the answer so you don't waste paper
How does computers help secretaries work