MKS, Inc (formerly called Mortice Kern Systems) is a subsidiary of PTC, Inc. It was previously a multinational independent software vendor that was acquired by Parametric Technology Corporation (now PTC) on May 31, 2011. MKS operated in the Application Lifecycle Management (ALM) and Systems Administration market segments. Integrity, a PTC Product manages systems and software development processes and connects engineering artifacts, including requirements, models, code and test, ensuring comprehensive lifecycle traceability.