Design, development and custom development of computer software for others for use in a variety of fields and applications, namely, engineering applications, architectural design applications, construction design applications, project planning and management applications, environmental engineering applications, quality control applications, water treatment and distribution applications, and hydropower design and control applications; providing consulting services to others in the design, selection, implementation and the use of software systems for use in a variety of fields, industries and applications, namely, engineering, architectural design, construction, environmental engineering, project planning and management, quality control, water treatment and distribution, and hydropower design and control; providing computer software technical support services, namely, troubleshooting of computer software problems for others in a variety of fields, industries and application, namely, engineering, architectural design construction, environmental engineering, project planning and management, quality control, water treatment and distribution, and hydropower design and control; consulting services in the field of engineering in the fields of water and wastewater modeling for utilities, municipalities and other engineering consultants; engineering services in the fields of water, wastewater modeling for utilities, municipalities and engineering consultants; consultation services, namely, calculating, modeling and simulating water and waste water treatment flows and preparing related reports and technical documentation for utilities, municipalities, and other engineering consultants