In the 19'th century machines changed the world., Suddenly people could travel more easily and communicate more quickly., Work changed, too, and many people got jobs in factories., It was the start of the Industrial Age., The second half of the 20th century saw the start of the computer age., At first, computers were very difficult to use and only a few people understood them., But soon computers began to appear in officies and then homes., Today, they are everywhere., Some people still say that they have never used a computer, but they probably use computers every day.., They just do not realize it., This is because there are computers in so many ordinary things : cars, televisions, cd players, washing machines., When the first computers were built in the 1940's and the 1950's, they were enermous., In fact, they were as big as a room., In 1949, the magazine Popular Mechanics made a prediction : " one day " they said, computers will be really small, in fact they will weigh less than 1.5 tonnes., Now, computer chips can be as small as this letter O., Over the past fifty or sixty years, computers have changed much more than people thought possible.

Informationtechnology_computerage_unjumble

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