S3 is also a company that used to produce graphics chipsets. Their 3D Accelerators were generally known for being cheap but not good or fast. They have since bought Diamond Multimedia and killed their graphics division.

An unrelated company, called S3 (Silicon & Software Systems), parent company Philips, home base in Ireland, also in Wroclaw Poland, Wien Prague do silicon and software design services. http://www.s3group.com