42 Computer software consultancy; Computer software consultation; Computer software design for others; Computer software design, computer programming, or maintenance of computer software; Computer software development; Consultancy in the field of software design; Consultation services in the fields of selection, implementation and use of computer hardware and software systems for others; Consulting services in the field of design, selection, implementation and use of computer hardware and software systems for others; Customization of computer hardware and software; Design and development of on-line computer software systems; Design for others in the field of computer networks, software, and engineering for the Global Positioning System; Design of computer hardware, integrated circuits, communications hardware and software and computer networks for others; Design of computer networks and software for others for the Global Positioning System; Design of computer programs and software relating to aircraft; Design of home pages, computer software and web sites; Design, development and implementation of software; Designing computer software for controlling self-service terminals; Developing of driver and operating system software; Installation of computer software; Maintenance of computer software; Periodic upgrading of computer software for others; Up-dating of computer software; Updating of computer software for others