42 Scientific and technological services and research and development relating thereto, namely, research and development in the field of aquaculture and research and development in the field of water purification; industrial research, testing and analysis of industrial fluids and waste products; engineering; technical advisory services relating to sludge removal; development and maintenance of computer software for use in measuring, detecting, monitoring and control of sludge-, mud- and water treatment systems; development and maintenance of data processing apparatus for measuring, detecting, monitoring and control of sludge- mud- and water treatment systems; providing temporary use of non-downloadable cloud-based software systems for measuring, detecting, monitoring and control of sludge- mud- and water treatment systems; monitoring of sludge and mud and water quality; electronic monitoring of industrial processes using computers and sensors