42 Design of commercial and residential buildings; Commercial and residential building design services; Consulting services in the field of structural engineering, namely, technical consultancy services relating to structural engineering; Consulting services in the field of civil engineering, namely, technical consultancy services relating to civil engineering; civil engineering; Engineering design services, namely, computer-aided engineering design and drawing services; Design of engineered building systems in the nature of HVAC systems, water and drainage systems, lighting systems, and communications systems; Engineering drawing services; Structural engineering services for the analysis of structures; Structural engineering design services; Structural engineering project feasibility studies; Design and development of computer software in the field of architecture; Computer software design and development, namely, computer software in the field of structural engineering and, design of modular buildings and building units; Computer software design; Computer software development; computer software consultancy; information, consultancy and advisory services relating to the aforesaid service