Computer consultancy services; computer disaster recovery services; computer security services; computer security engineering; computer research services; computer programming; computer software design; computer software development; computer software engineering; computer support services; testing of computers and computer equipment; updating of computer software; writing of computer software; consultancy in the field of computer hardware; computer rental; rental of computer software; installation and maintenance of computer software; computer security consultancy; security assessment services for computers; data security services; network security services; computer security services to assist the computer networking community in the prevention of, recognition of and recovery from computer security incidents, including viruses and hackers; research and development (for others) in the field of computer security; information services relating to computers; preparation of reports relating to computers