Question mark
In the early 13th century, when the growth of communities of scholars (universities) in Paris and other major cities led to an expansion and streamlining of the book-production trade, punctuation was rationalized by assigning Alcuin's stroke-over-dot specifically to interrogatives; by this time the stroke was more sharply curved and can easily be recognized as the modern question mark.
Looped square
The looped square (⌘) is a symbol consisting of a square with outward pointing loops at its corners. It is referred to by this name, for example, in works regarding the Mississippian culture. It is also known as the place of interest sign when used on information signs, a practice which started in Finland in the 1950s, spreading to the other Nordic countries in the 1960s. Also, the symbol is known as Saint John's Arms or Saint Hannes cross (related to Swedish "sankthanskors", Danish "johanneskors", and Finnish "hannunvaakuna"), as Gorgon loop, and as command key symbol due to its use on the command key on Apple computer keyboards.