It is the abbreviation of postscript (remarks, which can also be interpreted as postscript and postscript)

Origin:

1. (After the signature at the end of the letter) Furthermore, Also; postscript (abbreviated as P.S., PS., PS or p.s.)

2. Appendix (of a book, etc.); postscript, addendum

3. [English] (news (After the broadcast) Conclusion

PS stands for:

1 PS refers to postscript, which means "note, note";

2 PS refers to Photoshop, a well-known Professional image processing software, used by almost all advertising companies and graphic design companies;

3 PS refers to Sony's game console play station, and its subsequent versions include PS2, PSP, and PS3;

4 PS refers to Political Science, which is "political science", which is a branch of science;

5 PS refers to Polystyrene, a thermoplastic synthetic resin whose largest application field is the electronics/electrical appliance industry ...

And BS means contempt