42 Design, development, installation, maintenance and updating of computer software; design, development, installation, maintenance and updating of mobile applications; development and testing of computing methods, algorithms and software; design, development, maintenance and updating of computer platforms; hosting of websites, databases or mobile applications; software as a service [SaaS]; computer network design for others; computer network services; configuration of computer networks using software; installation, maintenance and updating of database software; design, development, maintenance and updating of database software; programming of operating software for computer networks and servers; technical data analysis; testing, authentication and quality control; authentication services for computer security; data authentication via blockchain; encryption, decryption and authentication of information, messages and data; providing artificial intelligence computer programs on data networks; research in the field of artificial intelligence technology; providing temporary use of online non-downloadable software in the field of finance, loans or investment; providing temporary use of on-line non-downloadable software for processing electronic payments; electronic monitoring of credit card activity to detect fraud via the internet; website design and development for others; consultancy, information and advisory services relating to all of the aforesaid services.