Polygonia comma form of comma is frequently confused with the dark form of the question mark ("P. interrogationis"), but the two can readily be distinguished by the shape of the comma mark on the underside. The pale form is easily confused with the satyr comma ("P. satyrus"), which usually occurs north and west of the eastern comma's range. They can be distinguished by the upperside color, which is orange brown in the comma and tawny yellowish brown in "P. satyrus"; by the underside pattern, which tends to be mottled in the comma but appears to be more longitudinally streaked in "P. satyrus";
Punctuation of English the dot used as a thousands separator (though a thin space is sometimes used for the latter purpose, especially in technical writing, regardless what the decimal separator is). In computing, the dot is used as a delimiter more broadly, as site and file names ("wikipedia.org", "192.168.0.1." "document.txt"), and serves special functions in various programming and scripting languages. Guillemets sometimes called French quotation marks, are relatively uncommon in English, but are sometimes used as a form of quotation mark. The question mark is used to mark the end of a sentence which is a question. Quotation marks are used to mark