David Weininger is an American chemist and entrepreneur. He is a co-founder of Daylight Chemical Information Systems, a company in Santa Fe, New Mexico that does rapid analysis of massive chemical databases. Weininger received his PhD in water chemistry from UW-Madison in 1978, and he is the inventor of the simplified molecular-input line-entry system (SMILES), a universal language for chemical compounds. Weininger and his team produced other specialized software packages for working chemists, including Rubicon, a rule-based geometry program for creating 3-D forms, and Thor, a client-server database for chemical information.
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