42 Computer software design; Computer software design and updating; Computer software design, computer programming, and maintenance of computer software; Computer software development; Computer hardware and software design; Computer programming and software design; Monitoring of computer systems to detect breakdowns; Creating, maintaining, and modernizing computer software; Custom design of computer software; Design and development of computer software; Design and development of computer game software; Design and development of computer hardware and software; Design and development of operating software for accessing and using a cloud computing network; Design and writing of computer software; Developing computer software; Updating of computer software