Software is definitely engineering. It's different in that we take on novel tasks every time. It's not like building a certain bridge that is virtually identical to some previous bridge or some previous building.

There is this broad, broad recognition of how technology is enabling new things. Companies that never paid attention to computers in any form now see digital technology as creating threats and opportunities for them.

The general idea of the rich helping the poor, I think, is important. That your sense of justice says, why should rich kids - who barely get these diseases and almost never die of them - why should they get the vaccines, when poor kids, who actually do die from these diseases, don't get those things? It's an unbelievable inequity that there isn't that access.

The year I was born, 1955, the first big disease-eradication program in the world was declared for malaria. After about a decade of work, they realized that, at least in the tropical areas, they did not have the tools to get it done.

I am super lucky. I've been in the area where things have been changing and been part of the digital revolution, the magic of software, the internet, the computer, and now the cellphone... so it's been a great privilege.

Teams should be able to act with the same unity of purpose and focus as a well motivated individual.

Microsoft was founded with a vision of a computer on every desk, and in every home. We've never wavered from that vision.