Comma (,) is a punctuation mark, which appears in different languages. In many fonts, it has the same shape as single quotes or single quotes, but differs from them in that they are on the baseline of the text. Some fonts make it a thin line, slightly curved or straight, but slanted relative to the vertical line; or a small solid figure 9.

Commas are used in many contexts and languages to separate parts of a sentence (such as clauses) from items in a list, especially when three or more items are listed. The word comma comes from Greek and originally meant to be a resection word. Specifically, it is a short clause in syntax.