How did 0 become yes and X become no on buttons?

1 pointAnimats2 comments

Keypads on point of sale devices recently switched over to new markings - 0 means yes, and X means no. How did this happen? Who standardized that?

One language-learning site suggests that this is a Japanese convention.[1]

[1] http://lang-8.com/269938/journals/170968434868620680211233240229157144229