Using Logitech Mice with OS/2 (version 1.2) All Logitech Mice work with the IBM OS/2 mouse drivers. Proper installation for the various types of mice is as follows: Series 9 Serial Mouse, Series 7 Serial Mouse: Select "Mouse Systems Mouse" during OS/2 installation. Note: When using the Series 9 Serial Mouse or Series 7 Serial Mouse, be sure to "cold boot" (power the system off and back on) when running OS/2, or issue the command MOUSE PC from the DOS prompt if booting from DOS to OS/2. MouseMan Serial Mouse, Dexxa Serial Mouse: Select "Microsoft Serial Mouse" during OS/2 installation. All Bus Mice: Select "Microsoft Mouse, Bus Version - Model 199" during OS/2 installation. All PS/2 Mice: Install as IBM PS/2 Mouse during OS/2 installation. Mouse-based software under the OS/2 Compatibility Box: All of the software mentioned below can only be run in the DOS Compatibility Box (also known as Real Mode). The DOS driver can only be run if the OS/2 driver is not loaded. The DOS driver should function properly in the Compatibility Box. DOS applications that support a mouse should work properly in the compatibility box with the OS/2 driver. If an application is not working properly with the mouse under the compatibility box, try running the application from DOS using the DOS mouse driver. System intensive applications may not function properly in the OS/2 DOS Compatibility Box.