ACES (computational chemistry)
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Aces II (Advanced Concepts in Electronic Structure Theory) is an ab initio computational chemistry package written and maintained by the research group of Rod Bartlett, at the Quantum Theory Project at the University of Florida. It contains an implementation of various electronic structure theory methods related to coupled cluster. There is an alternative version, CFOUR, that grew out of the ACES II Mainz-Austin-Budapest-Version.