Figure 1-2. Omnibook — Back View 18. Universal serial bus ports (USB). 22. LAN port (on certain models). 19. Infrared port (on certain models). 23. AC adapter jack. 20. External monitor port. 24. Kensington lock slot (security connector). 21. Modem port (on certain models). 25. System-off switch. Figure 1-3. Omnibook — Bottom View 26. Hard disk drive retaining screw. 27. SDRAM cover. 29. Main battery. 30. Main battery latch. 28. Docking port. 1-4 Product Information HP Omnibook 500