color=#000000 size=2>HP recommends Microsoft? Windows? XP Professional Intel 855 GM chipset 6-cell lithium ion battery External 65 W three-wire AC adapter Touchpad with dedicated scroll 7.28lbs and 1.62 inches thin 15-inch display One fixed optical drive Intel? 855 GM integrated graphics Interfaces: One type I/II PC card slot, one external monitor, one microphone in, one headphone in/line out, RJ-11 (modem), RJ-45 (NIC), 2 USB 2.0, 1394, S-video