Before the World Wide Web, do you remember how you would have found where Crimea is? How did you share pictures of your vacation or work when you were on the road? The Web has changed the way we work, share our lives with family and friends and even play games. This one innovation has brought an astonishing level of change in a short amount of time. Today, the Web is marking its 25th anniversary. On March 12, 1989, Tim Berners-Lee, a British computer scientist, introduced the idea of the World Wide Web in a proposal for an information system. Here, technology leaders, including Vint Cerf, and executives from Intel and AOL, reflect on how the Web has affected the world we live in.