Taking out the calculator:

For notebook displays (non-widescreen):

14.1" - 4:3 aspect ratio - 1024*768 - 91 dpi - 0.28 mm dot pitch
14.1" - 4:3 aspect ratio - 1400*1050 - 124 dpi - 0.20 mm dot pitch
15" - 4:3 aspect ratio - 1024*768 - 85 dpi - 0.30 mm dot pitch
15" - 4:3 aspect ratio - 1400*1050 - 117 dpi - 0.22 mm dot pitch

For desktop displays, up to 15", the LCDs tend to be 4:3 aspect ratio (1024*768), for 17" and 19" LCDs, they tend to be 5:4 with resolution of 1280*1024.

FewMiles..