WordNet (r) 3.0 (2006):

PST
    n 1: standard time in the 8th time zone west of Greenwich,
         reckoned at the 120th meridian west; used in far western
         states of the United States [syn: Pacific Time, Pacific
         Standard Time, PST]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

PST
       Pacific Standard Time [-0800] (TZ, PDT, USA)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

PST
       PWM Sharing Technology (Arctic Cooling)