HP Pavilion XT115 Reference Manual page 79

Add-On Devices
Connecting External Devices
10. PC Card and CardBus slot. See "Connecting PC Cards" on page 76.
11. IEEE 1394 port (on certain models).
12. Audio ports.
13. Infrared port (on certain models).
Locating connectors on the port replicator
14. AC adapter jack.
15. PS/2 keyboard and PS/2 mouse ports.
16. USB ports.
17. External monitor port.
18. Parallel port.
19. Serial port.
20. LAN port (works only if the computer has a built-in LAN port).
21. Digital audio port (SPDIF).
22. S-video port.
23. Audio ports (microphone, headphone, line-in).
24. USB port.
Reference Guide 79