AT&T Co has joined the fans of Apple Competer Inc’s Macintosh, giving the machine parity with those running MS-DOS, OS/2 and Unix on its Intel iAPX-86-based StarGroup Servers. A new StarGroup Server for Macintosh program, working in conjunction with the StarGroup LAN Manager Server, enables a Unix system computer to act as a file and print server for Macintosh clients, with full native interoperability, so that Macintosh users get the same benefits as those using MS-DOS, OS/2 or Unix and linked to the server. A data file created by a Macintosh client can be accessed and modified by any of the other operating systems and vice versa and a database application can be accessed by all four client operating systems and share the same server-based script and data files without the need for modifications to the files – and each client continues to use its own familiar interface and operating system features. No prices for the facility.