A method processes data in a packet-switched communication network having a plurality of network nodes, between which data packets are transmitted. The programmable logic device includes a JTAG logic that communicates with a JTAG scan chain and interprets user-defined instructions received from the JTAG scan chain to generate control signals used by a target device interface and the target device interface, which transmits output data to a target device and receives input data from the target device in response to the control signals. The plurality of layers include a metal thin-film in the vicinity of the light emitting region. Suitable powders include metals and metal oxides, alloys or blends thereof, and carbon derivatives. There is also a method for product inventory management, including receiving, in a server system and via a network, inventory data from a cabinet, the inventory data corresponding to an inventory of product units stored in the cabinet, and generating an order to have additional product units added to the cabinet according to the cabinet inventory. The first green color filter has a peak spectral sensitivity in a longer wavelength region than a wavelength of a peak spectral sensitivity of the second green color filter.