Introducing the OmniBook OmniBook Features OmniBook—Back View 23. Infrared port. Windows NT 4.0 does not support infrared communication. 26. Serial port (COM1). Use this port for a serial mouse, a modem, a serial printer, or other serial device. 24. Kensington lock slot (security connector) 25. Parallel port (LPT1). Use this port for a parallel printer, other parallel device, or to connect the floppy disk drive externally. 27. External monitor port. 28. Docking port. Reference Guide 15