56. Names Followed by Initials.—Baptismal names or initials following a surname are set off by commas: as, Arendale, Charles V.
57. Words, Phrases, and Clauses in a Series.—The members of a series of two or more words, phrases, or clauses standing in the same relation and not connected by conjunctions, are separated by commas. When the series consists of three or more members and a conjunction is used to connect only the last two, the comma may or may not be put before the conjunction. Better usage, however, favors the inclusion of the comma.
Right.—The teller was kicked, beaten, and robbed by four masked men.
58. After Interjections.—Interjections that are but slightly exclamatory are followed by commas.
The following distinctions in the use of the interjections O and oh may be noted: oh generally takes a comma after it, O never; except at the beginning of a sentence, oh is written with a small letter, O always with a capital; and oh is used always by itself, while O properly comes only in direct address: as, O Lord of life.
Right.—Ah, the happy days and the happy city!
Right.—Oh, but the way the boys splashed!
59. Short Quotations and Maxims.—Set off short informal quotations and maxims with commas.
Right.—He was last heard to say, "If I don't return in time, call up the office."
60. In Large Numbers.—Use commas to separate large numbers into groups of three figures each: as, $2,518,675. Omit the comma, however, in dates and in street, telephone, and automobile numbers.