The looped square ( ⌘), also known as Saint John's Arms, Saint Hannes cross (related to Swedish language sankthanskors, Danish language johanneskors, and Finnish language hannunvaakuna), and as the command-key symbol due to its use on the command key on Apple computer keyboards, is a symbol consisting of a square with outward pointing loops at its corners. It is referred to as a looped square, for example, in works regarding the Mississippian culture (approximately 800 Common Era to 1600 CE). It is also known as the place of interest sign when used on information signs, a practice that started in Finland in the 1950s, spreading to the other Nordic countries in the 1960s.
It is an ancient symbol used by several cultures, and remains in common use today. It belongs to a class of symbols which are called in Norway.Coat of arms for Lødingen Municipality, blazoned in the Norwegian Royal Decree of 11 May 1984, quoted in Hans Cappelen og Knut Johannessen: Norske kommunevåpen, Oslo 1987, page 197. The term is also used in Anders Bjønnes: Segltegninger fra hyllingene i Norge 1591 og 1610, Oslo 2010, pages 64–65.
It is also similar to a traditional Heraldry emblem called a Bowen knot.
In Finland, the symbol was painted or carved on houses and barns, and domestic utensils such as tableware, to protect them and their owners from evil spirits and bad luck. The oldest surviving example is a pair of 1000-year-old (Finnish pre-Christian period) ski decorated with the symbol.
The looped square also appears on artifacts of the Mississippian culture of the southeastern United States.
While Unknot, many depictions follow the convention for in that the crossings of the strand obey an under–over pattern.
The symbol later gained international recognition via computing. It is used on Apple Apple Keyboard as the symbol for the command key as well as in elementary OS as the symbol for the Super key. Why the Looped Square (⌘) Symbol?. Medium. 1 March 2018.
The looped square is used in the logos of Belgian telecommunications company Proximus and Canadian software company DistillerSR.
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