Braille

Reading by touch: six-dot cells encoding letters, numbers, music, and mathematics under a fingertip.

Core Principles & Analysis

• Louis Braille finished the system by 1824, at fifteen, refining a soldier’s "night writing".
• A six-dot cell yields sixty-three patterns, extended by contractions in Grade 2 braille.
• Braille codes exist for mathematics and for music notation, both standardized internationally.

Specifications & Metrics

• TYPE: Tactile (6-dot cells)