A few words about elevator buttons

Many of those who have taken the elevator may have noticed that most elevator buttons have dots below the floor number, like the one in the picture below. If you haven't noticed in a while, you should definitely pay attention the next time you take the elevator. But have you ever wondered why there are dots or dots engraved below the elevator buttons?

This is actually the Braille system. And in this system, blind people are able to understand which letters are which according to the pattern of the dots by running their fingers over these raised or convex dots and understand the meaning of the writing. As a result, by using these on the elevator buttons, blind people can easily go to their destination floor without anyone's help!