Dassault Systèmes Simulia Corp. is an engineering simulation software (CAE) vendor. Formerly known as ABAQUS Inc. and previously Hibbitt, Karlsson & Sorensen, Inc., (HKS), the company was founded in 1978 by Dr. David Hibbitt, Dr. Bengt Karlsson and Dr. Paul Sorensen, and has its headquarters in Providence, Rhode Island, United States.In October 2005, Dassault Systèmes acquired ABAQUS, Inc.