35 Advertising services; business management; commercial administration being business administration for others; cost analysis related to energy commodities; tracking and monitoring energy consumption for others for corporate account auditing purposes; industrial business management consultancy; commercial information and advice for consumers in the choice of energy consumption products and services; organization of trade fairs for commercial or advertising purposes in the fields of energy efficiency and energy production from renewable sources; arranging of trading transactions and commercial contracts in the fields of energy efficiency related to energy production, rational use of energy, and optimization of energy consumption, and also in the field of the sale of electricity to end customers; outsourcing services in the nature of arranging of contracts, for others, for the providing of services and for electricity marketing; goods and services price quotations in the field of electricity; business administration services; assistance and consultancy services with regard to business management of companies that provide energy produced through renewable and non-renewable sources installations; business information and advisory services on tariffs; commercial intermediation services, namely, mediation and conclusion of commercial transactions for others in the fields of energy production from renewable and non-renewable sources; commercial intermediation services, namely, mediation and conclusion of commercial transactions for others in the fields of the sale of energy from renewable and non-renewable sources to end customers; systemization of information into computer databases in the fields of energy production from renewable and non-renewable sources; retail and purchasing agency services relating to electric energy, wind energy, photovoltaic energy, thermal and water energy, gas, fuels and combustibles, namely, retail energy provider services that allow customers to purchase electric energy, wind energy, photovoltaic energy, thermal and water energy, gas, fuels and combustibles as part of a competitive retail energy market; purchasing agents in the field of electric energy, wind energy, photovoltaic energy, thermal and water energy, gas, fuels and combustibles and lighting; business administrative management of power plants engaged in the production and distribution of electric energy and gas; business management services and business administrative services for companies engaged in the installation, maintenance and management of machinery and equipment used in the production, storage and distribution of electric energy; purchasing of photovoltaic plants or other energy production installations, for others; business consulting services in the fields of energy measurement to improve energy efficiency within residential, commercial, industrial and institutional facilities; online marketplaces services, namely, online retail store services featuring virtual goods, namely, biofuel and energy, in particular energy from renewable sources for use online in online virtual environments and in online virtual worlds