a flat piece of material rectangular or square shape made of wood, metal, plastic, or other materials may have a frame, beveled edge, or some other decorative feature may have buttons, switches, or knobs may have one or more labels, displays, or lights may have a locking mechanism or other security features
panel which is a flat piece of material panel which has rectangular or square shape panel which has made of wood, metal, plastic, or other materials panel which may have a frame, beveled edge, or some other decorative feature panel which may have buttons, switches, or knobs panel which may have one or more labels, displays, or lights panel which may have a locking mechanism or other security features