42 Research and development and design of computer software, accounting software and computer software applications for others; Installation of computer software; Implementation of software by integrating existing software programs within the computer equipment and platform with newly installed software programs; Advisory services in the field of design, selection, implementation and use of computer software; Consulting services in the field of design, detection, implementation and use of computer software systems for others; Conversion of computer data and programs (other than physical conversion); Conversion of documents from a physical medium to an electronic medium; Computer programming; Computer system analysis; Technical project surveying