there are several artists called PS.

ps from Portugal is a one man project from Filipe Cruz, mostly doing Dark Ambient, Glitch, Experimental. Releasing on netlabels (enoughrecords, MiMi, Mirakel, EdP)
Also part of groups 5E Phalanx, Dotkràz and Gróhvrascht.

PS (NYC) is Patrick Savage and Ursula Damm from Brooklyn. Check them out at http://www.ps-nyc.com or on myspace at http://www.myspace.com/psnyc
They are currently working on their sophmore effort, the follow up to 2004's Double Standards.

PS is also a finnish alternative rock/pop band, mostly ran by Sami Sarhamaa and Pauli Päiviö. They've released three CD's: "Ajan Virrassa" (1995), "Onni" (2001) and "Oma Maailma" (2005). More or less on hiatus now as Sami is concentrating on his solo material under aliases Samsara's Revenge and Sam Marsala. Pauli is not actively pursuing music anymore.

Another artist name PS is Torsten Pröfrock.

P.S. is also a pop/rock duo from Slovakia.

PS, also known as P Savage, is also a rapper from Peckham, London, and is a part of the Zone 2 and HitSquad collectives. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.