Abstract: A retainer apparatus for removably engaging a tablet computer to a user's leg, the retainer apparatus includes a pair of opposed clips each being removably engagable to an outer periphery of the tablet, via a detachable extension member that is disposed to span between the opposing pair of clips resulting in the clips being compressed as against the tablet outer periphery at an angle that creates a moment that in effect rotates each clip to rotatably bind the clip to the tablet outer periphery for improved frictional contact between the clip and the tablet outer periphery. Also included in the retainer apparatus is a disconnectable band element that is removably attached to the extension member and is adapted to extend around and removably engage the user's leg.