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Computer viruses () Computer security () Use For: Cybersecurity Materials (R) Classes of materials (Rb) Building materials (Rbm) Use For: Construction materials Related Term (Associative): Equipment (Qt) Building materials by properties (Rbmd) Hydrocarbon based materials (Rbmdp) Asphalt based materials (Rbmdpb) Bituminous materials (Rbmdpc) Coal based materials (Rbmdpf) Maltha based materials (Rbmdpm) Malthene (Rbmdpmm) Use For: Petrolene Petrochemicals (Rbmdpp) Use For: Petroleum chemicals Hydrocarbon based materials from multiple sources (Rbmdpt)