Used in dialogue text, e.g., Juliet: O Romeo, Romeo! Wherefore art thou Romeo?
• Used in correspondence for headings and introductory terms (To: From: Re:) and to separate writer/typist and carbon-copy abbreviation from the recipients.Top of Page Comma (,) is most commonly used to separate or set off items that might otherwise be misunderstood, such as: • Members of a series used with “and,” “or,” or “nor.” • Main clauses, or before the conjunction in a compound sentence. • Two verb phrases in a sentence. • Subordinate clauses/phrases within sentence. • An apposite (noun referring to previous noun, e.g., my sister, Nancy) or contrasting words/phrases (e.g., I need you, not anyone else.