In a hundred years, when physical stores disappear from the face of planet earth and we do our shopping only online, Anand Rajaraman will still be remembered as one of the important men who helped take business online in the first place. He will also be remembered as the co-author of the paper ‘Implementing Data Cubes Efficiently’, one of the most cited computer science papers ever. He will also be remembered for the success of America’s two biggest retailers, Amazon and Walmart, one in the virtual space and the other in the physical space. Rajaraman has a B.Tech in Computer Science from IIT Madras, and an MS and PhD both in Computer Science from Stanford University. In 1996, when the idea of online retail was still in its infancy, Rajaraman founded Junglee Corp., which is credited with pioneering Internet comparison shopping. When Junglee was acquired by Amazon in 1998, Rajaraman went on to work as a director of technology and helped it in becoming a retail giant by introducing a third party marketplace platform. He is also credited with inventing the concept behind Amazon’s Mechanical Turk, a crowdsourcing Internet marketplace. In 2005, he cofounded Kosmix, a categorisation engine that lets you surf the web based on topic. It was acquired by Walmart in 2011 and has been turned into @WalmartLabs.