Computers have changed the world in the last 80 years. Before computers (send messages) were invented, dending messages in a short time used to be more difficult. These days it is easey to send messages in a short time. Postcards, on the other hand, are slow and unnatural. They don't use electricity, so they don't pollute the atmosphere.
Computers, however, can be very noisy and big. All in all, I think that the computer is a good invention, because it's faster than postcards.
Computers are essential for the future!!
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