Every time you use a computer, you use software. Each game and program for writing or doing budgets has software that allows the computer to work and to respond to […]
The helicopter was invented by the Chinese in the 4th century, more than a 1,000 years before Leonardo da Vinci. It was called the Bamboo Dragonfly and could fly 25 feet (7.6 m) up and down. The first modern helicopter was invented by the French.