Todo Bichig

Clear Script Oirat alphabet
Type	Alphabet
Languages	Oirat Sanskrit Tibetic
Creator	Zaya Pandita
Time period	ca. 1648 – today
Parent systems	Proto-Sinaitic script Phoenician alphabet Aramaic alphabet Syriac alphabet Sogdian alphabet Mongolian script Clear Script
Sister systems	Manchu alphabet Vagindra script
Direction	Top-to-bottom
ISO 15924	Mong, 145
Unicode alias	Mongolian
Unicode range	U+1800 – U+18AF

Clear Script (Oirat: ᡐᡆᡑᡆ
ᡋᡅᡔᡅᡎ, Тодо бичиг; Mongolian: Тод бичиг, ᠲᠣᠳᠣ
ᠪᠢᠴᠢᠭ᠌ tod biçig, or just todo) is an alphabet created in 1648 by the Oirat Buddhist monk Zaya Pandita for the Oirat language. It was developed on the basis of the Mongolian script with the goal of distinguishing all sounds in the spoken language, and to make it easier to transcribe Sanskrit and the Tibetic languages.

Clear Script is a Mongolian script, whose obvious closest forebear is vertical Mongolian. This Mongolian script was derived from the Old Uyghur alphabet, which itself was descendent from the Aramaic alphabet. Aramaic is an abjad, an alphabet that has no symbols for vowels, and Clear Script is the first in this line of descendants to develop a full system of symbols for all the vowel sounds.

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Wikipedia