Windows 8 is key to the future, the Surface computer.

In 1990, one in 10 children died before the age of five. That's now down to one in 20, and vaccines were the single biggest factor in that. Had it stayed at 10 percent, 122 million more children would have died.

I never took a day off in my twenties. Not one. And I'm still fanatical, but now I'm a little less fanatical.

The only definition by which Americas best days are behind it is on a purely relative basis.

It's fine to celebrate success but it is more important to heed the lessons of failure.

Newspaper readership is still growing in India.

Imagine, just for the sake of discussion, that you had a few hours a week and a few dollars a month to donate to a cause - and you wanted to spend that time and money where it would have the greatest impact in saving and improving lives. Where would you spend it?