Later in the 19th century, 7 has been adapted using a digraph of the "uu" instead of a W, which is the source of the name of the call letters W if w. In English, the present themselves.
Later in the 7th century, has been converted using the Twitter character "uu" instead of W, which is the source of the letter W to W in modern English there.
Later in the century 7 was modified using digraphs of "UU" instead of W which is the origin of the name call letters W that W. in English at the present time.