42 Computer software development in the field of mobile applications; design and development of software in the field of mobile applications; web site development for others; web site design; design and maintenance of web sites for others; design of home pages, computer software and web sites; design and development of virtual reality software; design and development of computer software that can be implemented on multiple computing platforms; legacy modernization services for moving an application, program or legacy system to new technologies and/or a new platform, namely, modernizing computer software; full-cycle user interface and user experience design services that result in delivering engaging experiences across web, mobile and desktop devices with different app development approaches, namely, design and development of computer software; providing quality assurance services in the field of mobile software applications, virtual reality (VR) software, and websites