There are different kinds of heroes, and very few truly historic ones. As heroes go, Steve Jobs was far and away in a class by himself.

I understand a little now how sad people were when John Lennon was killed. Of course in this case there isn't the shock factor — we've known for a long time that Steve's days were numbered. But it still comes as a blow to lose an icon that so much of my life has revolved around.

Steve made many, many marks on history. Now we will mourn for a while. And then we will carry on, because of the mark he made on us.