Design and development of virtual reality software; platform as a service (PaaS) for spending and trading non-fungible tokens (NFTs); design of computer software for transaction of non-fungible tokens (NFTs); hosting platforms on the Internet for issuing and trading non-fungible tokens (NFTs) using blockchain technology; certification (quality control) of data authenticated by non-fungible tokens (NFTs) using blockchain technology; platform as a service (PaaS); development, updating and maintenance of software and database systems; hosting platforms on the Internet for online content; on-line data storage; monitoring of computer systems by remote access; development and updating of computer software in the field of artificial intelligence; software as a service (SaaS) relating to artificial intelligence software; design of computer programs in the field of artificial intelligence; monitoring of telecommunication signals; design, maintenance, rental and updating of computer software