Digital Equipment said it will invest $116...

Digital Equipment said it will invest $116 million to set up a new semiconductor plant in Scotland that will employ 400 people by 1988 . . . Taft Broadcasting said it completed the previously reported purchase of five television stations and seven radio stations from Gulf Broadcast for $760 million . . . Merrill Lynch & Co. said it has acquired Saxe Realty, San Francisco’s largest residential real estate firm, for undisclosed terms.