As you read this, programmers hover over laptops and lattes at the Technology Square Starbucks, designing the Next Big Thing. It has never been so easy (or so cheap) to turn a good idea into a global product. So they devise apps to entertain you, devices to save you energy and time, and stuff you won’t know you need until they invent it. Technology Square is the heart of Atlanta’s start-up community and site of the Advanced Technology Development Center (ATDC) of Georgia Tech. Stephen Fleming, a former venture capitalist, runs this incubator and the overarching Enterprise Innovation Institute.