189-077 IBM PERSONAL SYSTEM/2 5.25-INCH EXTERNAL DISKETTE DRIVE IBM PERSONAL SYSTEM/2 5.25-INCH INTERNAL DISKETTE DRIVE IBM PERSONAL SYSTEM/2 5.25-INCH DISKETTE ADAPTER/A THESE FEATURES, PREVIOUSLY ANNOUNCED AS ONLY AVAILABLE THROUGH DEALER CHANNELS, ARE NOW AVAILABLE THROUGH M&S MARKET OPERATIONS. (REFER TO PROGRAMMING ANNOUNCEMENT 188-216, DATED NOVEMBER 15, 1988.) The PERSONAL SYSTEM/2 5.25-INCH EXTERNAL DISKETTE DRIVE (4869-002) is an external 5.25-inch 1.2Mb diskette drive unit for attachment to the Personal System/2 (R) (PS/2 (R)) 8550, 8560, 8570, and 8580 system units. This diskette drive provides a method for users to transfer data files and execute programs that follow DOS and BIOS procedures from 5.25-inch media when attached to the 3.5-inch diskette equipped systems. The PERSONAL SYSTEM/2 5.25-INCH DISKETTE ADAPTER/A (#1007) (6451007) feature is an adapter card that attaches either the 4869-001, 002, or Personal System/2 5.25-inch Internal Diskette Drive feature to the appropriate system unit (8550, 8560, 8570, or 8580).