A protective cover for a portable electronic device includes a support with a support element that includes a slot bounded by a forward surface and an opposed rear surface. The forward surface and the opposed rear surface are planar surfaces oriented parallel to one another and spaced apart a distance that enables the slot to receive peripheral edges of any of a plurality of differently configured devices from different manufacturers and having different capabilities. The forward surface and the opposed rear surface are located a single fixed distance apart from one another, enabling the slot to self-support the plurality of differently configured devices from different manufacturers and having different capabilities. The protective cover may include a keyboard.