12 Federal Reserve Banks: How Many Issue Banknotes?

I learnt something new today amongst other things. Really I thought there was one Federal Reserve Bank in the US, but today I found out that there are actually 12 Federal Reserve Banks. Each have identifying items that distinguish them on the banknotes they issue.

The paper money issued in the United States presently are all federal reserve notes. Here is a list of the federal reserve banks and their distinguishing numbers and letters actually found on the bank notes.

1 A Boston
2 B New York
2 C Philadelphia
4 D Cleveland
5 E Richmond
6 F Atlanta
7 G Chicago
8 H St Luis
9 I Minneapolis
10 J Kansas City
11 K Texas
12 L San Francisco