Serial comma toast. Adding a serial comma removes this ambiguity. Writers who normally avoid the serial comma often use one in these circumstances, although sometimes re-ordering the elements of such a list can help as well. In some circumstances using the serial comma can create ambiguity. If the book dedication above is changed to the serial comma after "Ayn Rand" creates ambiguity about the writer's mother because it uses punctuation identical to that used for an appositive phrase, leaving it unclear whether this is a list of three entities (1, my mother; 2, Ayn Rand; and 3, God) or of only two
Comma distinguish it from the Arabic diacritic "" (), representing the vowel , which is similarly comma-shaped. In Arabic texts, Western-styled comma () is used as a decimal point. Reversed comma () is used in Sindhi when written in Arabic script. It is different from the standard Arabic comma. Hebrew script is also written from right to left. However, Hebrew punctuation includes only a regular comma (). Dravidian languages such as Tamil, Telugu, Kannada, and Malayalam also use the punctuation mark in similar usage to that of European languages with similar spacing. In the common character encoding systems Unicode and ASCII,