A string of ones and zeroes was not a difficult thing for Bill Gates to distribute, once he'd thought of the idea. The hard part was selling it--reassuring customers that they were actually getting something in return for their money. Anyone who has ever bought a piece of software in a store has had the curiously deflating experience of taking the bright shrink-wrapped box home, tearing it open, finding that it's ninety-five percent air, throwing away all the little cards, party favors, and bits of trash, and loading the disk into the computer. The end result (after you've lost the disk) is nothing except some images on a computer screen, and some capabilities that weren't there before. Sometimes you don't even have that--you have a string of error messages instead. But your money is definitely gone. Now we are almost accustomed to this, but twenty years ago it was a very dicey business proposition.