I'm always looking for a new idea that will be more productive than its cost.
-- David Rockefeller

Albert Einstein, when asked to describe radio, replied: "You see, wire
telegraph is a kind of a very, very long cat. You pull his tail in New
York and his head is meowing in Los Angeles. Do you understand this?
And radio operates exactly the same way: you send signals here, they
receive them there. The only difference is that there is no cat."