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.

Kenya’s M-Pesa proves that when people are empowered, they will use digital tech to innovate on their own behalf.

If people had understood how patents would be granted when most of today's ideas were invented, and had taken out patents, the industry would be at a complete standstill today.

Every three years, we have to go to the governments and say, okay, you know you're saving millions of lives and even though your budgets are tight, helping Africa avoid this disaster really is a priority.

The need to communicate effectively with your customers will come up again and again.

The tablet is not mainstream. Reading off the screen is not mainstream.

DOS is ugly and interferes with users' experience.