The bowen knot is not really a knot, but more an endless rope. Named after James Bowen.
It has a lot of features of the VMS script: it has curly corners such as many of the VMS letters (P, F) for example:
When used as a symbol (⌘), an ordinary Bowen knot is known as Saint John’s Arms.
The Command key (⌘), also historically known as the Apple key, pretzel key, or meta key, is used on Apple Keyboards as symbol of ‘command’. http://en.wikipedia.org/wiki/Command_key
This symbol is called valknute in Scandinavia.
In swedisch: Sevärd, translation: worth seeing (..?)
From this the Three interlocking traingles symbol is derived probably.
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