Introducing the OmniBook OmniBook Features OmniBook—Side View 16. PS/2 keyboard or PS/2 mouse port (supports Y adapter). 20. Module release latch. 17. Universal serial bus port (USB). Windows NT 4.0 does not support USB. 21. Plug-in module bay. Can contain a CD-ROM drive, floppy disk drive, LS-120 drive, DVD drive, second hard disk drive, or a second battery. 18. System-off button (to shut down the OmniBook). 19. Built-in speakers. 22. Battery bay. User’s Handbook 13