An apparatus for supporting pot covers includes a frame movable between a collapsed position and an expanded position; a support for resting the frame on a surface and at least one pot cover support pivotally connected to the frame. A first current source is coupled to the power supply and generates a current that varies due to channel-length modulation. The height of the thread is such that the crest of the thread is located within an imaginary, second truncated cone that is coaxial with the distal end part. The color grade comprises a color name and one or more corresponding color coordinates andor one or more corresponding color notations, in the form of Color Name. The method includes generating internal application data in response to the occurrence of an internal event within the NFC system, and supplying the internal application data to a host processor of the NFC system. The slide portion is slidable within a horizontal plane, and the pressing portion presses the sheet resistive body by sliding the slide portion, and a resistance value between the sheet resistive body and the conductive plate changes in accordance with a change in a slide operation force for sliding the slide portion.