PPR40U00K012 - R400-S4831 Intel Core Duo 1.2,1024MB,DDR2,80GB 4200rpm(ATA-6),12.1in WXGA, 3Year Std warranty, Vista Business Intel Core Duo U2500 1.2 GHz, Centrino Duo Technology Hard Drive 80 GB - 4200 rpm, 12.1" TFT active matrix Microsoft Windows Vista Business Operating System