PSA
In the past, the "15" indicator referred to 15.6" screens (at least since 2007), and "16" to the newer 16.0" screens that seemed to slowly be replacing them. However, Lenovo has begun putting out new models called "15" as if they are a continuation of the old lines, but they now come in 15.3" sizes, I assume with a change from the 16:9 aspect ratio to 16:10 or 4:3 or some other taller variation. If this difference matters to you, be sure to check the model you are buying.