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So-called playstation symbols or "japanese symbols" refer to a common rating symbolism in Japan.
“When Japanese authors are appraising the merits of different objects, they often use geometric symbols like circles and triangles that look as if they were entered using the buttons on a Sony Playstation” ( "Playstation" symbols, retrieved 10:11, 16 July 2010 (UTC)).
According to The GITS blog (retrieved 10:11, 16 July 2010 (UTC)), a four point rating scale includes
|◎||nijuu maru||excellent, brilliant (also called bullseye, it represents the ideal condition)|
|〇||maru||satisfactory, pretty good effort, also replaces the western "tick"|
|△||sankaku||average, (also "in progress" in a planning context)|
|×||batsu||bad, poor, no good|
On a three point scale:
|〇||maru||good, also replaces the western "tick"|
Sometimes a five point scale is used adding a double cross XX, meaning very bad or severe problem.