The IBM 5520/Personal Computer Attachment Program enables you to switch back and forth between your microcomputer and the functions of text and files processing and document distribution. Using this program, you can emulate (imitate the functions of) an IBM 5253 Display Station and use the functions of the IBM 5520 Administrative System. You can also emulate an IBM 3278 Display Station and add, change, copy, or delete data in the data base of an appropriately programmed IBM System 370 attached to an IBM 5520.