Lenovo ThinkPad X1 (129126U) 13.3" LED Notebook - Core i5 i5-2520M 2.50GHz - 4G DDR3 320G HDD (Windows 7 Professional) - Black Intel Core i5 Processor 2.5GHz 4GB DDR3 RAM 320GB 7200RPM Hard Drive 13.3-Inch Screen Windows 7 Professional