Benjamin Franklin's phonetic alphabet as follows: Franklin's proposed alphabet included seven letters to represent vowels. This set consisted of two new letters, in addition to five letters from the existing English alphabet: a, e, i, o, u. The first new letter was a formed as a ligature of the letters o and a, and used to represent the sound (as written in IPA). The second, ɥ, was used for . Franklin proposed the use of doubled letters to represent what he called long vowels, represented by modern phonemes thus: as the long-vowel variant for (or, in his notation, "cɩcɩ" versus "cɩ"), for ("ee" versus
Avestan alphabet alphabet, with explicit characters for vowels, and allowed for phonetic disambiguation of allophones. The alphabet included many characters ("a", "i", "k", "t", "p", "b", "m", "n", "r", "s", "z", "š", "x") from cursive Pahlavi, while some ("ā", "γ") are characters that only exist in the Psalter Pahlavi variant (in cursive Pahlavi "γ" and "k" have the same symbol). Some of the vowels, such as "ə" appear to derive from Greek minuscules. Avestan "o" is a special form of Pahlavi "l" that exists only in Aramaic signs. Some letters (e.g. "ŋ́", "ṇ", "ẏ", "v"), are free inventions. Avestan script, like Pahlavi