It's often interesting that something that seems so simple in retrospect took a long time for someone to imagine it and put it to use. I think the concept of zero in a number system would be another example.
Big Al
-------------------------------- Money seems to buy the most happiness when you give it away.
Why does everything have to be so complicated, all in the name of convenience. -ShiroKuro
A lifetime of experience will change a person. If it doesn't, then you're already dead inside. -MarkJ
Posts: 7466 | Location: Western PA | Registered: 20 April 2005