I don't know if I agree with you, Cindy. For me, the most useful invention of all time is surely the internet,We can now reach people and do business faster.I own a clothing store in Mexico City, and there's a lot of competition, I also have a website.Now, people from all over the world can buy my clothing. WITH emails, I can keep in touch with friends and family in Mexico and around the world. It's faster than usual mail,and it's cheaper than using the phon!