A portable folding electronic device has a base with a longer length dimension and a shorter width dimension and a user interface on one surface. The user interface may be oriented for use when the base has a portrait orientation. The device also has a screen unit with a longer length dimension and a shorter width dimension and a screen on one surface. A linkage connects the base to the screen unit. The linkage provides at least two degrees of freedom between the base and the screen unit such that the screen unit may be moved to a first position folded onto the base, with the length dimension of said screen unit aligned with the length dimension of the base, and to a second position tilted with respect to the base, with the length dimension of the screen unit aligned with the width dimension of the base.