I think the most important invention is the computer. Charles Babbage and Alan Turing are people who changed the world with the computer. The computer was built in Great Britain during World War II to crack German codes.

The first electronic computers, which were not "personal", were huge, expensive and required a team of engineers and other specialists to keep them running. 

Surprisingly, the computer is a machine that has several advantages for all people, for example; you can store large amounts of information or browse the Internet, and it helps to sort, organize and search for information.

Today, hundreds of companies sell personal computers which help many students. 

Unsurprisingly, now almost everyone uses it in our daily lives. But unfortunately, computers are very expensive for some families.