A cradle for supporting and retaining a tablet computer having four sides, a front, and a back. The cradle has a base, projecting arms coupled to the base and located along three of the four sides of the tablet computer when the back of the computer is on the base, and one or more moveable arms that are selectively engagable along the fourth side of the tablet computer when the back of the computer is on the base, to selectively retain the tablet computer in the cradle.