It's not easy to remember, but IBM was the computer industry when I was growing up. You loved 'em. You hated 'em. You knew what they were doing. They had set a standard for mainframes. They also set a standard for great sales focus and heavy product R & D.

Digital technology has several features that can make it much easier for teachers to pay special attention to all their students.

Sometimes we do get taken by surprise. For example, when the Internet came along, we had it as a fifth or sixth priority.

Some very poor countries run great vaccination systems, and some richer ones run terrible programs.

People always fear change. People feared electricity when it was invented, didn't they? People feared coal, they feared gas-powered engines... There will always be ignorance, and ignorance leads to fear. But with time, people will come to accept their silicon masters.

Vaccination is pretty special because you can do a vaccination campaign anywhere in the world. All you are doing is gathering women from the villages, getting them the vaccines and asking them to go around and find the children.

Like any well designed software product, Windows is designed, developed and tested as an integrated whole.