One of the famous brand of HP maybe Compaq, now i just provide some information about one series of Compaq.

Compaq 6535s series business series laptop, not a hig-end product, but actually enough for most user.

For Compaq 6535s(FQ990PA) spec part, AMD Turion 64 X2 RM-70 processor(2GHz), 2GB DDR2 memory, 160GB SATA 5400rpm, 14.1" TFT Lcd Screen(1280*800, just same with most laptop now), ATI Radeon HD 3200 display card, 2.27kg weight.

For Compaq 6535s(FZ667PA) spec part,AMD Athlon 64 X2 QL-62 processor(2GHz), 2GB DDR2 memory, 250GB SATA 5400rpm, 14.1" TFT Lcd Screen, ATI Mobility Radeon HD 3200 display card, 2.27kg weight. For Compaq 6535s(FZ667PA) spec part, AMD Athlon 64 X2 QL-60 processor(1.9GHz), 2GB DDR2 memory, 250GB SATA 5400rpm, 14.1" TFT Lcd Screen, ATI Mobility Radeon HD 3200 display card, 2.27kg weight.

For Compaq 6535s(FW117PA) spec part,AMD Turion 64 X2 RM-70 processor(2GHz), 2GB DDR2 memory, 250GB SATA 5400rpm, 14.1" TFT Lcd Screen, ATI Mobility Radeon HD 3200 display card, 2.27kg weight.