What We Like About It: Elements of Style is a classic book that has been required reading for many college courses for over a decade. While text messaging and social media obliterate the English language, Elements of Style is a great reminder that simple rules actually DO exist when it comes to grammar. This new edition is much more fun to read than previous versions, largely due to the whimsical paintings and illustrations.
Here is an excerpt:
In a series of three or more terms with a single conjunction, use a comma after each term except the last. red, white, and blue or gold, silver and copper
However, in the case of business firms, the last comma is usually omitted.
Little, Brown and Company.