On 2007/05/25 15:24 (GMT+0800) Nick Cowie apparently typed:

> 1em =  100% = 16px = 16pt (yes 1px = 1pt for the screen) in all  PC based
> browsers since 2000

This statement would be technically incorrect even if sic s/16pt/12pt/.
s/16pt/12pt/ because the majority of systems are running a nominal DPI/PPI
of 96, which because points are 72 DPI real, means there is 1.333px per pt
nominal.

Another reason it's incorrect is that not all modern browsers use the common
16px/12pt default. http://archivist.incutio.com/viewlist/css-discuss/68515

The third reason follows.

> unless changed by the user or PC manufacturer (this is
> becoming a little more common with laptops having twice the pixels per inch
> or cm that desktop screens).

While it is true that it is becoming more common, it's been doing so long
enough that it is already very common, particularly since laptops have been
outselling desktops for several years. The higher resolution laptops tend to
have windoz set to 120 DPI instead of 96 DPI, with the result that their
12pt defaults are all 20px instead of 16px. The ones that don't use the 120
setting tend to not sell very well because so many people see everything is
too tiny otherwise compared to the systems they're familiar with.
-- 
"The path of the righteous is like the first gleam of dawn, shining
ever brighter till the full light of day."      Proverbs 4:18 NIV

 Team OS/2 ** Reg. Linux User #211409

Felix Miata  ***  http://mrmazda.no-ip.com/


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