Definition of "PS"

(linguistics) Initialism of a number of proto-languages' names:

1. Proto-Slavic.  examples

2. Proto-Semitic.  examples

3. Proto-Salish, Proto-Salishan.  examples

4. Proto-Sahaptian.  examples

(video games) Initialism of PlayStation.  examples

(software) Initialism of Photoshop.  examples

(computing, file format) PostScript, a page description language.  examples

Initialism of postal service.  examples

(education) Initialism of public school.  examples

(government) Initialism of public service(s).  examples

(video games) Initialism of PlayStation.  examples

(nautical) Initialism of paddle steamer.  examples

Initialism of power supply.  examples

(law enforcement, Commonwealth) Initialism of police sergeant, a police rank used in Commonwealth countries.  examples

(organic chemistry) polystyrene  examples

(sports) Initialism of parallel slalom.  examples

Initialism of post scriptum, postscriptum, postscript. (initialism written at the end of a text as a footnote)  examples

(telecommunications) Abbreviation of packet-switched.  examples

metric horsepower  examples