If you've found some way to educate yourself about engineering, stocks, or whatever it is, good employers will have some type of exam or interview and see a sample of your work.

India just went 3 years with no cases [of polio]. Pakistan is our toughest location right now because some parts of the Taliban have not allowed vaccinators to come in and have even attacked vaccinators. We are hopeful this will get resolved since no one wants their kid to be paralyzed. I spend a lot of time making sure the polio campaign is doing the best it can. We have great computer models that help guide our activities.

I'm not big on to-do lists. Instead, I use e-mail and desktop folders and my online calendar. So when I walk up to my desk, I can focus on the e-mails I've flagged and check the folders that are monitoring particular projects and particular blogs.

To be a good professional engineer, always start to study late for exams because it teaches you how to manage time and tackle emergencies.

Countries which receive aid do graduate. Within a generation, Korea went from being a big recipient to being a big aid donor. China used to get quite a bit of aid; now it's aid-neutral.

If you take from the most wealthy and give to the least wealthy, it's good. It tries to balance out.

Software innovation, like almost every other kind of innovation, requires the ability to collaborate and share ideas with other people, and to sit down and talk with customers and get their feedback and understand their needs.