American Telephone & Telegraph Co., New York, has entered into agreements with several makers of small computers to ensure that its new Unix System V operating system is compatible with the manufacturers' operating systems. (An operating system controls a computer's processes.)
The companies are: Microsoft Corp., Bellvue, Wash.; National Semiconductor Corp., Santa Clara, Calif.; Motorola Inc., Schaumburg, Ill.; Intel Corp. Santa Clara, and Amdahl Corp., Sunnyvale, Calif.
Additionally, AT&T named Microsoft to participate in its pilot Unix System V verification service, which will help ensure compatibility between System V-derived applications.
Pacific Telesis Group, San Francisco, signed an agreement with National Telephone Co. of Spain (Telefonica) to pursue joint ventures in computers, fiber optics, mobile telephones and other voice and data services.