components, but some of them differ, especially those from 2006 and 2009, as the technology developes in time. They have either Intel Core Duo or Intel Core 2 Duo processor, 13.3″,15.4″ or 17″ matte or glossy LCD, ATI Mobility Radeon x1600 or nVidia Geforce 8600M GT graphics, hard drive available from 80GB to 500GB