42 providing temporary use of non-downloadable software for accessing, reading, and tracking information in the field of blockchain transactions; providing temporary use of non-downloadable software, namely, computer software for accessing, browsing and searching online databases; design and development of search engine software; developing platform-as-a-service (PaaS) infrastructure for others for searching structured and unstructured data in the field of data analytics; providing internet search engines; software as a service (SAAS), namely, search engine software; software development, namely, development of software for searching structured and unstructured data in the field of data analytics; application service provider featuring application programming interface (API) software for analyzing market data; application service provider featuring application programming interface (API) software for gathering market data; platform as a service (PaaS) featuring blockchain based software platforms, namely, software for transfer or exchange of virtual currencies for data using smart contracts for conducting transaction to conduct the transactions; platform as a service (PaaS) featuring blockchain based software platforms, namely, software for transfer or exchange of virtual currencies for information and files using smart contracts to conduct the transactions; platform as a service (PaaS) featuring computer software platforms used to facilitate blockchain and distributed ledger technology to support a marketplace for roaming communication services between networks; user authentication services using blockchain technology for cryptocurrency transactions and online software applications