Abstract: A portable support device is described for holding a laptop computer, other electronic device, book or notebook, or other load object on a tiltable support board for viewing and operation by a person situated in any of a variety of body positions, including, but not limited to sitting, lying, and reclining in a variety of indoor and outdoor locations. The tiltable support board may accordingly be positioned and locked into a variety of angular inclinations with respect to a structure of the portable support device while the laptop computer or other load is securely displayed to the situated user, who may be sitting or lying under the device. In a preferred embodiment, the portable support device also comprises a set of legs that are independently extendable and independently angularly positionable in order to allow for use on a variety of uneven surfaces, including beds, couches, and uneven outdoor locations.