This dictionary offers an excellent selection of approximately 200,000 terms of the basic sciences (such as physics, chemistry and mathematics), industry (mechanical engineering, metallurgy, machine tools, construction, electronics, automotive, electronics, computers, telecommunications, textiles, plastics, glass, paper, wood, publishing), as well as terms related to these sectors, including materials, processes, tools and products. Emphasis has been placed in the classification of each term within its scope and the inclusion of synonyms, of the latest technical advances as well as brief explanations of documentary support for clearly differentiating the terms. Second, the dictionary presents more acronyms and abbreviations used within the industry. This large inventory of terms is totalemnte date.