I was wondering about the reason of the choose of the X as symbol used to represents the "Close application" operation.

  • related to eXit ? (just wondering)
    – Max
    Oct 11, 2014 at 23:24
  • Possible related to - When you want to cross out something you've written, you draw an X over it. Oct 12, 2014 at 0:05
  • 1
    Please avoid answering in comments. Try to find some support for your claims, and make them as full answers. Oct 12, 2014 at 16:12

1 Answer 1


In the article "The origins of the use of [x] in UI design" you can read:

The use of [x] for close and [o] for open could come from the Japanese symbols batsu and maru.

Bastsu and maru

Batsu (x) is the symbol for incorrect, and can represent false, bad, wrong or attack, while maru (o) means correct, true, good, whole, or something precious. Batsu and maru are also common hand gestures. Cross your arms over your chest for batsu, circle your arms over your head for maru.

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