United Computing was founded in 1963 above a hair salon in Torrance, California,[2] and went on to purchase the Automated Drafting and Machining (ADAM) software code from MCS in 1973.

The following year, United Computing was acquired by the aerospace company McDonnell Douglas (now part of Boeing), who created new CAD/CAM divisions, naming one the Unigraphics Group.

UGS, SDRC, and Nastran were merged into a single Line of Business (LOB) named EDS PLM Solutions.

[9][10] Helmuth Ludwig was appointed president and worked with the management team on creating a long-term strategic direction.

In October 2008, to expand its portfolio, Siemens acquired Schwelm based 'Innotec GmbH' - an international vendor of digital engineering software and services for the process industry, and known for its COMOS platform.

[11] On November 9, 2011, Siemens announced the acquisition of 'Vistagy, Inc.' - a Massachusetts-based supplier of specialized engineering software and services with emphasis on designing and manufacturing structures made of advanced composite materials.

[16] In November 2016, Siemens announced plans to acquire EDA company Mentor Graphics for $4.5 billion to incorporate electronics integrated circuit and systems design, simulation, and manufacturing solutions[buzzword] into their portfolio.

[20] In November 2022, it was announced Siemens Digital Industries Software had acquired the Tewksbury, Massachusetts-headquartered simulation-independent verification IP supplier, Avery Design Systems.

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