I have received letters for years, and some of the most common things in letters are post-scripts, however, there are also these funny little "N.B." which obviously do not stand for Post Script. What are these letters and how are they used?
Derived from the Latin (and italian) nota bene, meaning note well (take notice).
It is used to draw the attention to a certain aspect.
Nota Bene = note well in latin, basicially just "note"