I think Internet is the most important invention in the world. I was created in 1960s during the Cold War, it was called Arpanet. The US army used it to communicate with each other quickly and secretly. Before that, they used telegrams but it was too expensive and slow. On the other hand, it was safer than now because nobody could hack it.
I choose Internet instead of books because books are so heavy that our backs hurt althought books don't damageour sight.
Another positive point of Internet is that you download books freely or really cheaply and from any part of the world although sometimes they are incomplete.
Anyway, I choose Internet because it can always be improved so maybe, one day, we will have our school books in tablets and our backs will be healthy.
