Braille is a different typographic representation of the alphabet for the visually impaired.
Unfortunately, it has a tremendously low literacy rate, and few are even aware of that (learn more).
To the uninitiated, Braille may seem bewildering and in fact, it is recognized that
"[...] the dots are assigned in no obvious order" .
However, Braille as I see it is beautifully divided and organized by defining features. The Alphabet is easily distinguishable from punctuation, end marks from internal punctuation, and even small from large punctuation. This system will enable you to memorize Grade 1 Braille in minutes and spread awareness in the process.
Despite its age, Grade 1 Braille (G1) is still recognized as a random mapping of Alphanumerics to cells. On the contrary, lies an organization that procedurally generates Braille with only a polydactyl handful of rules. However, before getting started, it's important to clarify that this is a mnemonic aid; you will be able to encode and decipher G1 Braille, but fluency is a matter of practice & rote memorization.