Building glass, architectural glass; glass panes, insulated glass, window glass, safety glass for building purposes, laminated flat glass, colored sheet glass, decorative glass, modified sheet glass, non metal curtain walls, non metal windows, non metal skylights, non metal exterior window shades; storefronts in the nature of prefabricated windows and doors made primarily of glass, sliding storefronts in the nature of prefabricated sliding windows and doors made primarily of glass, and building entrances in the nature of prefabricated windows and doors composed primarily of glass