Microsoft co-founder and philanthropist Bill Gates on Thursday shared a photograph of himself in his 20s on Twitter. "When I was in my 20s and early 30s, I was fanatical about software. Now, I'm learning from these fanatics," he captioned the image with a link to his list of Favourite Fanatics of 2016. Interestingly, the list includes Infosys Co-founder Nandan Nilekani.