Electricity
Well for a long time electricity has been proved as a boon to the world. But it has been an important issue to have safety while working with electricity. It has given the world a light where one can do anything even at night . Moreover , one will be astonished to know that it is the electricity which is used to transfer the data from one point to another. The cables like fiber optic cables are used to transmit such type of data over the electricity. SO since the advancement of electricity it has been used in almost each and every field.