Brailroom

Ratan learns the Braille alphabet using the Braille Tutor

Duration : 0:1:29

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An alphabet is a standardized set of letters — basic written symbols or graphemes — each of which roughly represents a phoneme in a spoken language, either as it exists now or as it was in the past. There are other systems, such as logographies, in which each character represents a word, morpheme, or semantic unit, and syllabaries, in which each character represents a syllable. Alphabets are classified according to how they indicate vowels:

* the same way as consonants, as in Greek (true alphabet)
* abbreviation of consonants, as in Hindi (abugida)
* not at all, as in Phoenician (abjad)

The word “alphabet” came into Middle English from the Late Latin word Alphabetum, which in turn originated in the Ancient Greek Αλφάβητος Alphabetos, from alpha and beta, the first two letters of the Greek alphabet.[1] Alpha and beta in turn came from the first two letters of the Phoenician alphabet, and meant ox and house respectively. There are dozens of alphabets in use today. Most of them are composed of lines (linear writing); notable exceptions are Braille, fingerspelling, and Morse code.

Duration : 0:0:32

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Lauren talks about braille.

Sesame Street is a production of Sesame Workshop, a nonprofit educational organization which also produces Pinky Dinky Doo, The Electric Company, and other programs for children around the world.

Duration : 0:2:23

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