zCommerce is to eBay, as radio is to telegraph… (“eBay, except there’s no cat!”)
citing the Einstein cat story:
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.
–Albert Einstein, when asked to describe radio.