what os the significance of the invention of the typewriter and Transcontinental railroad?&' The years they were invented please.

The typewriter was not invented by a single person; there
were multiple people working independently with each other who either created their own
machine or perfected the work of another. The reference below gives a more detailed
description of its history. The typewriter allowed for uniform printing of text at a
speed much faster than could be accomplished by hand writing; a professional typist
might be able to type as much as 100 words per minute. The typewriter was an
indispensable business machine until it was superseded by the word processor, which was
built on the same principle as the typewriter.

The
Transcontinental Railroad was perhaps one of the greatest technological achievements of
the nineteenth century. It connected the Western United States with the East, and made
transcontinental shipment and travel a matter of days rather than months or years. The
western U.S. largely developed along the lines of the transcontinental railroad and
contributed to a truly "national" economic system as well as economic growth for the
entire country.