An apparent need exists for compact devices to ergonomically support such items as laptop computers, keyboards and projectors. The AIRDESK® desk/stand design positions such items with full 3D positioning using all 6 directions of adjustment. Each direction of motion has the correct friction and range of motion for easy and secure re-positioning. Unique accessory shelves and cup holder may be attached to the device frame. A unique, flat, very thin, trip-free base provides unparalleled positioning flexibility of the unit, furniture legs may be placed directly on the base sheet. Additionally, a unique universal and quickly installed folding frame for an automobile or truck seat is provided for supporting the AirDesk positionable tray in a vehicle. AirDesks allow computing from any chair, recliner, sofa, bed, while standing or in a vehicle. The unique trip-free base may also be used for such applications as supporting medical equipment and crowd control stanchions.