The Federal Aviation Administration currently has about 1,100 employees -- from pilots to lawyers -- using computer tablets, has future plans for an app store, and now plans to broadly expand the use of iPads within the agency, according to its tech group. The FAA currently allows employees to use iPads to read and send e-mail or documents, and does not allow the devices to be used to access FAA networks. But that is scheduled to change. The FAA's manager of Architecture and Applied Technology said that by 2014, the FAA plans to allow workers the choice to replace laptops with iPads. It plans to consider Android-based tablets as well. The FAA's own internal research has found the devices useful in particular applications, improving efficiency and costs, but also found them limited in other ways.