MDS 665.4

Wording: Applied science & technology Chemical engineering Technology of industrial oils, fats, waxes, gases Mineral Oil, Shale Oil, Asphalt, etc.

0 Computer science, information & general works 252,013 ℹ️	1 Philosophy & psychology 270,129 🧠	2 Religion 681,242 🙏	3 Society, government, & culture 1,328,382 👫	4 Language 209,883 💬	5 Natural sciences & mathematics 431,918 🔬	6 Applied science & technology 940,635 💡	7 Arts & recreation 1,031,850 🎨	8 Literature & rhetoric 1,436,736 📚	9 History & geography 837,760 🗺️
60 Technology 9,943 💡	61 Medicine & health 306,082 💉	62 Engineering 157,979 🔩	63 Agriculture 88,093 🌱	64 Home economics & family management 172,237 🏠	65 Management & public relations 145,064 👔	66 Chemical engineering 19,470 🚀	67 Manufacturing 8,724 📦	68 Manufacture for specific uses 20,805 🔨	69 Buildings 12,238 👷
660 Biotechnology, Explosives, Plastics 5,433 ⚗	661 Technology of industrial chemicals 539 🧪	662 Technology of explosives, fuels, related products 1,117 💣	663 Beverage technology 1,376 🍻	664 Food technology 3,983 🍞	665 Technology of industrial oils, fats, waxes, gases 1,231 🛢	666 Ceramic and allied technologies 1,081 🏺	667 Cleaning, color, coating, related technologies 771 🖌	668 Technology of other organic products 2,333 💄	669 Metallurgy 1,606 💍
665.0 3	665.1 Candles; Torches 7	665.2 Animal Oil 9	665.3 Vegetable Oil 64	665.4 Mineral Oil, Shale Oil, Asphalt, etc. 20	665.5 Petroleum Products 584	665.6 Lamps	665.7 Natural Gas, LPG 294	665.8 Hydrogen 141	665.9 6
665.40	665.41	665.42	665.43	665.44 1	665.45	665.46	665.47	665.48	665.49