text: ~ becomes Isolated from ·rts objectives. This leads to a definition ~ of the National System of Science and Technology as the Inter- 11-4 157 related group of the following subsystems with their respective functions: a) Research, whose purpose Is to generate new sclentlf lc' and technological know-how. b) Researcb-prpductlon I Ink which Is to orientate the sele­ ctlop of technologies; apply technologtcal know-how to the production of goods and services. and transform the requirements of national production Into specific demands for technology. c) Education-research link, whose purpose Is to prepare researchers and professionals of the highest level. for the productive system. d) Spc!al communlcat!pn, which Is to diffuse for the use of society, Information ret ated to the nature. functions, problems and products of science and technology e) Normative An4 planning, which should provide the legal and political framework w lth In wh feb the system of science and technology Is to operate, establIsh a follow-up of this operation and evaluate It In terms of the national goals and strategies. Research Subsystem : There are many Institutions Jn the ocuntry engaged fully or partially In scientific research and technological development. They may be grouped Into three sectors: Higher Education Sector, Including publ lc and private Institutions; centers and laborato­ ries In universities; and technological schools. The bulk of baste research Is carried out In these research centers although some. principally In engineering, agronany and medicine, are often oriented to applied research and the development of techno­ logies. Furthermore, they work to prepare squads of resear­ chers, thereby uniting research activities with the formation of high level human resources. Many of these Institutions enjoy administrative autonomy, which extends to research activities. Public Sector Includes all entitles where research Is carried out and which depend directly on or are coordinated by, a 
analysis: The text discusses the national system of science and technology, highlighting its components, functions, and institutions involved. It emphasizes the importance of research, education, and communication in generating new scientific and technological knowledge, applying it to production, and diffusing it to society. The text does not explicitly mention economic development, natural resources, or environmental concerns, but rather focuses on the system's internal workings and relationships.