42 Design, development, installation, maintenance, updating and rental of software for managing energy attribute certificates, trading energy attribute certificates, allocating energy attribute certificates to consumers, allocating energy to consumers, managing contractual and commercial electricity positions, billing in the field of energy, managing energy quality and origin, calculating and managing carbon emissions; software as a service [SaaS] for managing energy attribute certificates, trading energy attribute certificates, allocating energy attribute certificates to consumers, allocating energy to consumers, managing contractual and commercial electricity positions, billing in the field of energy, managing energy quality and origin, calculating and managing carbon emissions; technical consultancy, information and advice relating to managing energy attribute certificates, trading energy attribute certificates, managing contractual and commercial electricity positions, managing energy quality and origin, calculating and managing carbon emissions.