Innovation is moving at a scarily fast pace.

It's easier to add things on to a PC than it's ever been before. It's one click, and boom, it comes down.

The future of Windows is to let the computer see, listen and even learn.

In programming when you're making a change you have to know all the affected places, and you have to be able to model in your head what the performance impact will be.

That way you can be certain to learn something you didn't know previously.

As you get to the end of the project you want to run all the tests cases against one version and make sure that you know that that version passed everything. And so as you get late in the project you get a little more conservative about making radical changes to the software.

Measles will always show you if someone isn't doing a good job on vaccinations. Kids will start dying of measles.