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RELX Group (RELX plc, pronounced "Ree-Lex") is a multinational information and analytics company headquartered in London, UK. Its subsidiaries, including Elsevier, LexisNexis, and Reed Exhibitions, operate in areas such as scientific, technical, and medical (STM) information and analytics, legal information and analytics, provision of decision-making tools, and the organization of exhibitions. RELX operates in 40 countries worldwide, serving customers in over 180 countries.