42 Measurement in the field of energy saving in connection with energy consumption in buildings; scientific technical consulting in the field of energy usage management; scientific consulting in the field of customer relationship management of energy customers; scientific consulting concerning the compilation of data in the following fields: energy, energy customers, the energy trade and market, energy invoicing and tariff setting, and the calculation and breakdown of energy costs; scientific analyses of data on energy; development, updating and maintenance of software in the field of managing energy and energy customers, data collection on energy and on customers, energy market and trade, information on energy, energy billing and pricing, calculation and accounting of energy costs; technical planning of installations, namely, drawing up target specifications and technical reports related to computer hardware and software for data acquisition for management of energy and energy customers, the collection of data on energy, energy customers, the energy market and trading, and the calculation and breakdown of energy costs; drawing up technical expert opinions concerning computer hardware and software for the collection of data on energy, energy customers, the energy market, and energy trading; accreditation, certification, technical control, namely, technical testing and performance of technical or scientific tests by sampling of equipment, apparatus and installations all concerning the collection of data in the fields of energy, energy customers, the energy market and trading, energy usage, energy invoicing and tariff setting, and the calculation and breakdown of energy costs; fraud and abuse detection in managing energy and energy customers, data collection on energy and on customers, energy market and trade, information on energy, energy billing and pricing, calculation and accounting of energy costs; technical planning of infrastructure for sales points, namely, planning of building automation, heating, ventilation and air conditioning systems, building telecommunications systems, and identification authorization and cash-free means of payment systems