What is p.s.k. what does it mean?

As an AI language model, I cannot infer the context of the term "p.s.k." as it can refer to different meanings in different fields. Here are some possible interpretations:

• In the field of communication, P.S.K. stands for Phase Shift Keying, which is a digital modulation technique used in wireless communication systems to encode data as variations in the phase difference of a transmitted signal.
• In the field of banking, P.S.K. stands for Privatbank Suedtirol, which is a South Tyrolean bank (Italy) that offers various financial services such as loans, savings, and investments.
• In the field of music, P.S.K. stands for Park Side Killers, which is a rap group originated from California, USA.
• In the field of computer science, P.S.K. can stand for other jargons such as PuTTY Secure Keyboard, Patterned Square Kilometer, or Port Scan Keeper, depending on the context.

Therefore, providing more contextual information would help to identify the specific meaning of P.S.K.