10 Great Features in 10 Different OSes

If you were making the ultimate operating system, what features would you choose? I've been fortunate to use a pretty wide range of OSes over the years — some by choice, others by necessity. Each OS has some nugget that we can enjoy, learn from and build on.

So here, in no particular order, are 10 different features I love in 10 different OSes (Redmondmag.com).