Abbreviation of postscript (remark, which can also be interpreted as postscript and postscript)

Source: 1, (signed at the end of the letter), and; P.S., P.S. , PS or p.s.

2. Appendices (to books, etc.). ); postscript

3.[ English] Conclusion (after news broadcast)

In addition, the reason for extra points is that this is a shorthand habit in English, just like NO when writing numbers.