A dictionary of oil and natural exploration, drilling, production, refining, petrochemicals, storage, transport, uses of petroleum products.. A dictionary of coal, biomass, electricity, energy from sun, wind, water or oceans, nuclear or geothermal energy.. A dictionary of sciences and mathematics, physics, chemistry, biology, earth sciences.. A dictionary of interdisciplinary communications, data processing, economics, environment, legislation, pollution, safety, units of measurement.. 80 000 words and terms translated or explained.. 10 000 definitions or clarifications in each language.