Not long ago, it seemed absurd for academics to carry around a computer, camera, and GPS device every where they went. Actually, it still seems absurd. But many professors (and administrators) now do just that in the form of all-in-one devices. Smartphones or tablet computers combine many functions in a hand-held gadget, and some users are discovering clever ways to teach and do research with the ubiquitous machines. Some of the most innovative applications for hand-held devices have come from professors working on their own. They adapt popular smartphone software to the classroom setting, or even write their own code. The author asked about the areas in which professors and college officials are making the most of their mobile devices. In this paper, he shares the scenarios that people mentioned most often and the apps in each category that got users' highest marks.