Software authoring; Software design and development; Computer software consultancy; Computer software design; Computer software design for others; Computer software design, computer programming, and maintenance of computer software; Computer software development; Custom design of computer software; Customizing computer software; Debugging computer software for others; Design and development of software in the field of mobile applications; Design, development and implementation of software; Developing customized software for others; Installation and maintenance of computer software; Installation of computer software; Programming of computer software for others; Rental of application software; Rental of computer software and programs; Research and development of computer software; Smartphone software design; Testing of computer software; Troubleshooting of computer software problems; Updating of smartphone software; Upgrading of computer software