100 years of changes This century has been one of many changes and incredible inventions. If anyone thought about it, this century has brought us from horsepower to injection power, from gas lights to sodium vapor street lamps, from crystal radios to digital television, from compasses to GPS navigation systems, from wood stoves to ovens microwave. ovens, from Victrolas to DVD players and of course from hot air balloons to jet-powered aircraft. Over the last 100 years we have made much progress in all areas of society. The way people live has changed dramatically just in the last century. Technology in particular has advanced more in the last 100 years than in all previous periods combined. For example, thanks to research conducted by many innovative and dedicated individuals such as the Wright brothers who were the first to advocate flight in a powered aircraft, we are able to fly around the world in just a few hours in pressurized jet-powered aircraft . . One hundred years ago, the thought of a man flying in a car was crazy. The Wright brothers helped realize the dream of manned flight. Many years later, when the idea of ​​manned flight became a reality, space exploration was the next step. In 1969 many people didn't believe what happened. Neil Armstrong and Buzz Aldrin landed on the moon. They put up an American flag, explored, collected space rocks and returned home. Many Americans didn't believe the technology existed to do this. Today, several missions a year are launched using manned space shuttles that can be returned to Earth as gliders and reused on future space missions. Another example of the change in our technology over the last century is the change in the computer. In 1946, the first electronic computer called ENIAC occupied the space of a large room. Instead of using transistors and IC chips, the ENIAC used vacuum tubes. Compared to many current computers, the ENIAC is about as powerful as a small calculator. It may not be much, but it is a milestone because there would be no computers today if it weren't for ENIAC. As the years went by, the computer became smaller and more powerful. Today, more than half of the American population has a computer at home. Today's personal computers are thousands of times more powerful than the most powerful computers of fifty years ago.