Getting Started with Your HP Notebook Identifying Parts of the Computer Back View 18. PS/2 keyboard or PS/2 mouse port (supports Y adapter). 22. External monitor port. 19. Two universal serial bus ports (USB). 23. Docking port. 24. AC adapter jack. 20. Serial port (COM1). Use this port for a serial mouse, modem, printer, or other serial device. 25. Modem port (on certain models). 21. Parallel port (LPT1). Use this port for a parallel printer or other parallel device, or to connect the floppy disk drive externally. 26. LAN port. 27. PC Card and CardBus slot. 28. Wireless on-off button and indicator light (on certain models). 16 Reference Guide