COMPUTER NETWORK EQUIPMENT, NAMELY, HARDWARE AND SOFTWARE FOR IMPLEMENTING AND OPERATING COMPUTER NETWORKS OVER ELECTRICAL POWER TRANSMISSION CIRCUITS; COMPUTER HARDWARE AND SOFTWARE FOR IMPLEMENTING AND OPERATING COMPUTER NETWORKS IN BUILDINGS HAVING PRE-EXISTING POWER DISTRIBUTION CIRCUITRY; COMPUTER NETWORKING HARDWARE; COMPUTER NETWORKING SOFTWARE FOR THE HOSPITALITY INDUSTRY FOR NETWORKING DISTRIBUTED COMPUTERS VIA A POWER DISTRIBUTION NETWORK