Software as a service [SaaS]; platform as a service [PaaS]; design and development of computer software; providing information on computer technology and programming via a web site; data encryption and decoding services; providing temporary use services of online non-downloadable single sign-on software; user authentication services using blockchain technology; computer programming; maintenance and updating of computer software; developing and creating computer programs for data processing; computer platform development services; electronic data storage; off-site data backup; conversion of data or documents from physical to electronic media; updating of data processing software; conversion of computer programs and data, other than physical conversion