42 Computer software design; Computer software design for others; Consultancy in the field of software design; Consulting services for others in the field of design, planning, and implementation project management of graphical user interfaces, on-line and off-line software user interfaces and experiences, and user interaction design; Consulting services for others in the field of design, planning, and implementation project management of researching user interaction and experience, user testing, and usability testing; Custom design of computer software; Software design and development; Software development in the field of graphical user interfaces, on-line and off-line software user interfaces and experiences, and user interaction design; Website usability testing services