What are Serial Commas?

What are serial commas? Serial commas are pretty bad ass, that's what. Here are four reasons why:

1. Serial commas have aliases: They're also known as Oxford Commas and Harvard Commas. So, serial commas are kind of like the James Bond of punctuation.
2. Serial commas go before the word and (lions, tigers, and bears).
3. Serial commas go before or (delighted, happy, or thrilled).
4. Vampire Weekend wrote a song all about the Oxford Comma.

I wrote a little rhyme you might enjoy:

A serial comma goes before each element
In a series of three or more
Even before and and before or.

See APA 4.03 for more information or watch this nifty video my friend Tobias and I made. That's right. I said nifty.