Design, development and implementation of software; implementation of computer programs in networks; maintenance of software; development of computer hardware and software; software engineering; development and maintenance of computer database software; design of computer database software; reconstruction of database systems for others; electronic storage services for archiving databases; hosting of databases; providing on-line non-downloadable software for database management; rental of computer database software; rental of database management software; technical project studies in the field of computer hardware and software; configuration of computer networks by software; configuration of computer software; configuration of computer systems and networks; advice relating to the development of computer systems; advisory services relating to computer systems design; advisory services relating to computer systems analysis; advisory services relating to computer based information systems; consultation services relating to computer systems; information services relating to the application of computer systems; information services relating to the development of computer systems; monitoring of computer systems for detecting unauthorized access or data breach; monitoring of computer systems for security purposes; monitoring of computer systems to detect breakdowns; disaster recovery services for computer systems; computer systems integration services; development of computer software for use with computer-controlled switching systems; engineering services for applications on large and medium-sized computer systems; installation, maintenance and repair of software for computer systems; evaluation of performance of computer systems against bench-mark references; quality control relating to computer systems; development of software for secure network operations; development of technologies for the protection of electronic networks; provision of technical support in the operation of computing networks; civil infrastructure engineering services; consultancy and information services relating to information technology architecture and infrastructure; consultancy and information services in the field of information technology architecture and infrastructure.