AT&T; announced changes to make it easier...

AT&T; announced changes to make it easier for customers to use computers based on its Unix operating system. The new Open Look feature of Unix software will allow users to manipulate the computer with graphic symbols instead of written commands, American Telephone & Telegraph Co. said. The changes represent another step toward acceptance of Unix in the business world. Until recently, Unix was seen as mainly for science and engineering. Open Look was designed for AT&T; by Sun Microsystems Inc., the burgeoning maker of engineering workstations based in Mountain View, Calif.