What does the symbol on a power button mean? How did it come about?
the power symbol was born: a large circle (0) interrupted by a small vertical line (1). This language-agnostic design was ...
朝日新聞社3 年
Don’t hesitate in a train crisis, keep pushing emergency button
The traveling public is being urged to check where the emergency button on trains is located as soon as they board and to keep pressing it if an incident unfolds where passengers’ lives are at ...