Product development, namely, development of software programs for others; consultancy services in the fields of computer software and hardware, computer hardware and software installations, updating software, computer hardware and software leasing, consultancy services in the fields of copying data, renewal and restoration of computer software, regeneration of computer data and software, and computer system analysis; consultancy services in the fields of transferring data or documents from physical media to electronic media, conversions of computer data and programs, and leasing of computers; consultancy in the field of computer hardware; maintenance of computer software