Proper noun
(video games, dated) The original Sony PlayStation (as opposed to the PlayStation 2, the PSOne, or the later PSX).
(video games) The PSX PlayStation, based on the original PlayStation, with an integrated DVD drive to play DVD videos
Source: en.wiktionary.orgAt close on Monday, the Pakistan Stock Exchange’s (PSX) benchmark KSE 100-share Index finished with a rise of 0.08% or 40.55 points to end at 49,965. Source: Internet
Phillips 66 (NYSE: PSX), an energy manufacturing and logistics company, announces fourth-quarter 2017 earnings of $3. Source: Internet
Sony's North American division, known as Sony Computer Entertainment America (SCEA), citation originally planned to market the new console under the alternative branding "PSX" following the negative feedback regarding "PlayStation" in focus group studies. Source: Internet