Abstract: A lightweight collapsible stand for books and the like includes a strip of substantially rigid material defining a front major panel, a back major panel secured to the front major panel by a foldline, a bottom panel secured to the front major panel by a foldline, and a securing flap secured to the back major panel by a foldline. The strip is movable between use and storage orientations, in the use orientation the major panels defining the sides of a triangle and the bottom panel and the securing flap cooperatively defining the base of the triangle, and in the storage orientation the major panels being parallel and the bottom panel overlying the back major panel. The stand also includes releasable fasteners disposed on the securing flap and the bottom panel for cooperatively securing them together in the use orientation, and releasable fasteners disposed on the bottom panel and the back major panel for cooperatively securing them together in the storage orientation.
Abstract: A hand-held calculator for use in conducting classroom demonstrations of the operation thereof, including use of the operation instruction key means. The calculator comprises a frame, a keyboard section, data processing means and a display section and where both the keyboard and display sections are transparent to permit images thereof to be projected on a screen for teaching purposes.