[xaphod]

The Windows key is a tragic misstep in computer evolution. It should not exist.

[lproven]

The "Windows key" is just Microsoft branding. It was called the Super key before that, and it dates back to the 1970s.

Here's an example on a Sun keyboard, labelled with a diamond: http://xahlee.info/kbd/iold51593/Sun_Microsystems_Type_6_Key...