The comma ( , ) is a punctuation merk that appears in several variants in various leids. It haes the same shape as an apostrophe or single closin quotation merk in mony typefaces, but it differs frae them in bein placed on the baseline o the text. Some typefaces render it as a smaa line, slichtly curved or straicht but inclined frae the vertical, or wi the appearance o a smaa, filled-in nummer 9.
The comma is uised in mony contexts an leids, mainly for separatin pairts o a sentence such as clauses, an items in lists, pairteecularly when thare are three or mair items leetit. Accordin tae the Oxford English Dictionary, the wird comma comes directly frae the Greek komma (κόμμα), which means something= cut off or a short clause. A comma can an aa be uised as a diacritic when combined wi ither characters.