so and so's top ten

http://inventors.about.com/od/famousinventions/tp/topteninvention.htm

It all talks about inventions , it's intersting , there are telephone , computer, television , automobile , cotton gin , camera , steam engine , sewing machine , light bulb, Pencillin. I have seen telephone , computer, television ..., but not cotton gin, steam engine. I agree the ranking , example telephone is very important , it can talk to others , so we don't need to go out , and be tire. so I think the telephone is most important , and it also ranking most important.