That's my first post about special education. More specifically about blind people and how they can communicate. I hope you will enjoy it!
Braille code is called the writing and reading system for the blind. Its name is due to inventor Louis Braille (French).
Louis was blind at a very young age and was not pleased with the reading system used by the blind because it was hard to use with thick characters. So he set out to create a new special alphabet for blind people. It took him five years but in the end he did it. This alphabet made by Braille was a replacement of the grammatical alphabet with embossed moments, which in various combinations attributes a text.
The blind can with this system read by touching the moments with the finger, that is, we have reading by touch. The Braille system has six embossed dots like the head of a pin. They are placed three times, and they make 63 combinations, which correspond to the letters and numbers. Braille is read from left to right and from top to bottom, just like the scriptures. Τhe difference between the English and the French alphabet is 4 letters, (c, v, w, q).
image: from lectures 
The Braille display is called the Braille character creation device, usually by lifting holes through the holes of a flat surface. Blind computer users, who can not use a regular computer screen, use it to read text.
image: from @evagreca
The official introduction of the Braille Code for the Greek language was made in 1948.
Source of information: Lecture notes from the Faculty of Special Education (University of Thessaly - Greece)
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actually that one of the question i ever wanted to know, thank you sir for providing these information.
Thank you!
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Σε ευχαριστώ @andyblack!
Louis Braille was a really brilliant inventor, even though he's also blind, he never gave up, he helped a lot of blind people.
He was a great man!! A true isnpiration!!
Interesting information ! Thank you @evagreca.
Thank you @giosou!
Beautiful post @evagreca ☺!!
Thank you for doing something for these category of special people!
The truth is that they are really hypersensitive with the rest of their senses, more than the rest of us! And due to that, they are more tolerant than us in many ways!
Thank you @alinak15!
The blind are wonderful people. They perceive the world in a very different way and I am excited to work with so different children!