all the things sharyl sandberg has brought forward in her lean-in conversation but we need to do more's on the frontier in the technology world or artificial intelligence or biomedicine. what is it that in the end matches your excitement about the world we've been talking about all this hour? possibilities extra improvements in the lives of people around the world. >> over the holiday the memo i wrote for microsoft was about this agent that will perfect your memory, remind you to do things at the right time. using the computer will help you to the input super well. software, these still a lot that can be done there and hopefully that inspires microsoft to do things. i spent earlier this week with medical scientists and that was so amazing because despite what you see in how many new drugs come out the last few years, medical science is really on the verge of break throughs and not just for the developing world although fortunately that is -- >> rose: are you thinking of things like stem cell. >> yes. various ways of attacking cancer. still cell immunotherapy. this period will be so in