Abstract: A computer frame of riveted modular construction, formed by a plurality of essentially flat structural members provided with stiffening ribs which members are formed from zinc plated sheet metal and only joined together by riveting following an additional step of fully zinc plating the individual members, with no need for any further protective and finishing treatments.

Abstract: Rack housing for user reconfigurable EDP system comprised of a frame frontally opened to allow the insertion of a plurality of printed wired artworks (PWA) each one in a rack position. A protection ruler fixed, with the aid of tools, to the open frame front prevents the extraction from the frame of the PWA constituting a basic EDP configuration. Substitution of optional PWAs into the system via selected rack positions is accomplished by suitable undercuttings selectively arranged on the projecting edge, and by one or more panels covering the open front and removably fixed. Each panel is easily removable without need of any tool, so that the protection ruler is positioned between frame and cover panel (or panels) and cannot be removed without the previous removal of the cover panel (or panels).