Utilize the input text as a context reference, choose the right relationship between Autodesk and AutoCAD from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Calibre Diona has been partnering with Autodesk for 20 years, and our products have enabled them to continue innovating to deliver valuable design and engineering solutions to their customers as both CAD technology and engineering practices have evolved from the drawing board to AutoCAD and now to BIM.

Answer: owner_of