42 Computer software consultancy; Design and development of computer software; Design, development and implementation of software; Design, development, and implementation of software for building performance analysis; Design, development, installation and maintenance of computer software; Design, installation, updating and maintenance of computer software; Software as a service (SAAS) services, namely, hosting software for use by others for use building performance analysis; Computer simulation based on computer programs for others; Consulting services in the field of software as a service (SAAS); Design and development of computer software for building performance analysis; Design and writing of computer software; Design of computer databases; Developing and updating computer software; Engineering services for building and property condition assessment; Engineering services in the field of energy efficiency; Installation of building performance analysis software; Providing temporary use of non-downloadable cloud-based software for building performance analysis; Technical consultation in the field of environmental science, engineering services, design for others in the field of energy engineering, designing and testing of energy products for others