Braille Markings are a system of raised DOTS that represent letters, numbers, and punctuation marks. It was developed in the early 19th century by Louis Braille, a French educator who was blind. The DOTS are arranged in patterns of two columns of three DOTS each, with each pattern representing a letter, number, or punctuation mark. The term 'DOTS' is used to refer to the raised bumps that make up the Braille markings.