42 Design and development of computers and software for others; computer system design; architectural consultation; consultancy in the field of computer hardware; environmental protection consultation in the fields of research; quality control for others; design and development of computer software; technical project studies, namely, conducting feasibility studies in the fields of management and exploitation of airports, luggage processing, flight management, checking-in management of passengers and luggage, biometrics, assistance contracts management, consultancy, training, electronic management of documents, transport tickets reservation management, maps and photographic libraries management, remote displaying and video surveillance supervision; conducting feasibility studies relating to engineering services; services of engineers; software installation; rental of computer software; computer rental; maintenance of computer software; updating of computer software; maintenance of computer software; computer programming for others; urban planning; drawing up of construction plans; consulting in the fields of architecture, engineering, computers, and use, maintenance, installation, and provision of computer hardware and software systems for operating smart card systems and smart card management computer hardware and software systems; airport engineering; providing information in the field of computers