Night writing visited the National Institute for the Blind in Paris, France, where he met Louis Braille. Braille identified the major failing of the code, which was that the human finger could not encompass the whole symbol without moving and so could not move rapidly from one symbol to another. His modification was to use a six-dot cell, the Braille system that revolutionized written communication for the visually impaired. Night writing Night writing, a.k.a. sonography, was a system of code that used symbols of twelve dots arranged as two columns of six dots embossed on a square of paperboard, and is now
Writing system alphabet, or were directly inspired by its design. The first true alphabet is the Greek script which consistently represents vowels since 800 BC. The Latin alphabet, a direct descendant, is by far the most common writing system in use. Several approaches have been taken to classify writing systems, the most common and basic one is a broad division into three categories: "logographic", "syllabic", and "alphabetic" (or "segmental"); however, all three may be found in any given writing system in varying proportions, often making it difficult to categorise a system uniquely. The term "complex system" is sometimes used to describe those