Portable inclinating desk for notebook computers

A portable desk for use in home and office environments for comfortably and conveniently supporting a portable computer or other electronic device on the lap or knees of a user. The desk has an upper surface on which the computer rests. The desk is supported on the user's lap by a flexible, bowable support member which is repositionable, thus allowing the user to change the inclination of the desk in order to adjust the viewing angle of the computer screen. A flexible tray for an accessory such as a mouse may be inserted in a slot at either side of the desktop. The tray may be reversibly inserted with a smooth, planar surface or a textured, frictional surface disposed facing upwardly. Ventilation is provided through a transversely recessed convex channel in the upper surface and may also include a small, USB-powered fan to increase heat dissipation. Cable management features may also be provided.