A respected technologist and business leader, Steven Sinofsky is an investor, adviser, as well as a Board Partner at the Andreessen Horowitz venture capital firm. He began his career at Microsoft in 1989. He started as a software design engineer in development tools. Working in product management, he grew to be one of the company's senior executives on Microsoft Office overseeing six major releases of the full range of Office apps and creation of Office servers. Most recently he served as President of the Windows division through 2012. In this role, he oversaw many of Microsoft's largest products, including the development of the Windows operating system, as well as Windows Services such as Outlook.com (http://outlook.com/), OneDrive and Identity. Sinofsky frequently comments on products, development and management at his blog, blog.learningbyshipping.com (http://blog.learningbyshipping.com/), and on twitter, @stevesi. He earned a BA in Computer Science from Cornell and an MS from the University of Massachusetts, Amherst.