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In 1883, it was the "railroad industry" that was responsible for creating the first system of time zones in the United States, since the introduction of rail travel meant that there needed to be a set table of departure and arrival times across the US. 

Answer:

Operators of the new railroad lines

Created the time zone as already proposed by sir sandford Fleming

Explanation:

Scottish-born Canadian Sir Sandford Fleming proposed a worldwide system of time zones in 1879, so sir Sanford Fleming proposed it first.

But then,

Operators of the new railroad lines needed a new time plan that would offer a uniform train schedule for departures and arrivals.

Four standard time zones for the continental United States were introduced on November 18, 1883.

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