Few people think of buildings as high-tech, but they are: Everything from communications and fire control systems to HVAC is computer-controlled, relying on advanced networks and complex software to do their jobs. Click here to find jobs working on embedded systems. With a team that includes developers, engineers and project managers, New York's TEC Systems specializes in implementing the systems that keep offices humming. We visited the company's headquarters in Long Island City, N.Y., to get a feel for what's going on behind the walls.

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