42 Production, development, further development and design of computer programs and software, in particular for professional applications in business areas, for example for business administration and controlling, production and management of materials, quality management and maintenance, sales, personnel policy and project management; implementation, maintenance and rental of computer programs and software; providing online non-downloadable computer programs and software for big data solutions, digital commerce activities, marketing and design solutions and advisory services; outsource services providers in the field of information technology in the field of implementation, maintenance, and rental of computer programs and software and providing online non-downloadable computer programs and software for big data solutions, digital commerce activities, marketing and design solutions and advisory services; development of system analysis systems for electronic data processing and control of systems for electronic data processing; technical consultancy, in particular with regard to the creation, development, use and application of computer programs and software; computer technology consultation; software engineering and computer programming services; application support, namely, troubleshooting of computer software problems; computer technology consultation in the field of deployment planning of computer solutions; research, development, and technology consulting in the nature of project analysis in the field of information technology; advisory services relating to information technology; cloud computing, namely, providing virtual computer systems and virtual computer environments through cloud computing, data security consultancy, consultancy relating to the design of information systems; IT consultancy, advisory and information services; consultancy and information services relating to information technology; development and maintenance of computer software; providing online non-downloadable software for big data solutions, digital commerce activities, marketing and design solutions and advisory services; maintenance of software used in the field of e-commerce; design and development of software for supply chain management; programming of software for e-commerce platforms; consultancy in the field of providing software as a service (SaaS); design and development of single sign-on software; consultancy relating to the creation and design of e-commerce websites; design and development of software in the field of mobile applications; technical support services relating to computer software and applications, namely, troubleshooting of computer software problems; providing on-line support services to users of computer programs, namely, general support and maintenance of any software solutions provided or created, as specified in the contract with the client; development of databases; maintenance of online databases; programming of database management software; design of data files, namely, design of information graphics and data visualization material, development, installation, updating and maintenance of computer software and database systems; providing non-downloadable online database management software; development of custom made software for others, namely, designing, developing, implementing and managing of internet of things software; all the aforementioned services excluding marketing survey design and software for locating housing