HA, had Braile changed over the years very much like many languages? Are there various forms? I had read somewhere there were like different levels <One, Two? > but don't know much about it
There are 3 kinds of Braille: Grade I, Grade II and Grade III.
Grade I is uncontracted Braille and consists of words that are spelled out. It also includes punctuation.
Grade II is contracted Braille and is made up of short form words to represent complete words. For example, the word "can" is represented by the letter C, the word "knowledge" is indicated with the letter K, the word "people" is denoted with a letter P. There are other abbreviations that represent words such as a "the" sign which represents the word "the" or an "-en" sign which can be the prefix or suffix of a word. Grade II Braille also consists of punctuation and number signs which indicates that what is written is a number as opposed to a letter. There is also a capital sign which indicates that a word has been capitalized.
Grade III Braille contains the most abbreviations and is another way of writing shorthand. There are a variety of shortcuts that are used to write words and numbers. This kind of Braille is primarily used by students.
There is also something called Nemeth Braille which is a way of denoting mathematical equations in Braille.
Finally, there is Braille music notation which is simply Braille music.
Braille really hasn't changed all that much since it was developed by Louis Braille.
However, over the past 30 years, there have been a few changes made by the Braille Association of North America (BANA) including the exclusion of Grade 1 1/2 Braille which was the happy medium between Grade I and Grade II which was primarily used in the 50s and 60s.