In low-income countries, getting to a health post is hard. It's very expensive.

People in business understand paying money to be more efficient. You can bootstrap markets where the devices are too expensive at first because these are so valuable to some people.

Whenever you have multiple devices including multiple PCs that you want to share information with, it's always been a bit complicated.

The best teacher is very interactive.

The job was to put into a, a computer with only 4K of memory an entire basic full blown, floating point Basic and that's one of the greatest programming feats I've ever had a chance to work on.

I've been studying how quickly we can get energy out to the poor countries - a lot of which are in Africa - and how little progress we've made there. There's no more electricity today in sub-Saharan Africa per person than there was 20 years ago.

The poor can't wait. Philanthropists needed to carry on being generous.