This is the single greatest technological achievement in all of human history.

The march of technology, from the first sparks of fire to the microprocessors of today, have led us to this moment of technological achievement. We have put human beings on the Moon, replaced vital organs by artificial means and gathered all of human history on a network that anyone in the world can access at any moment. 

But I am convinced that the single greatest technological achievement of humankind is the ability of my wife to create and send me this:

Sending men to the moon was great, but this is better.