writing system-
A writing system is any conventional method of visually representing verbal communication. While both writing and speech are useful in conveying messages, writing differs in also being a reliable form of information storage and transfer.
The general attributes of writing systems can be placed into broad categories such as alphabets, syllabaries, or logographies. In the alphabetic category, there is a standard set of letters (basic written symbols or graphemes) of consonants and vowels that encode based on the general principle that the letters (or letter pair/groups) represent speech sounds.
In a syllabary, each symbol correlates to a syllable or mora. In a logography, each character represents a word, morpheme, or other semantic units.
Other categories include abjads, which differ from alphabets in that vowels are not indicated.
Abugidas or alphasyllabaries, with each character representing a consonant–vowel pairing. Alphabets typically use a set of 20-to-35 symbols to fully express a language,
whereas syllabaries can have 80-to-100, and logographies can have several hundreds of symbols.
Writing systems worldwide. Principal scripts at the national level, with selected regional and minority scripts.
1-Alphabets: Latin , Cyrillic , Georgian , Greek , Armenian
2-Abjads: Arabic (Uyghur uses an Arabic-based alphabet, not an abjad), Hebrew and Arabic Arabic and Neo-Tifinagh (Neo-Tifinagh is an alphabet, not an abjad)
3-Abugidas: North Indic , South Indic , Ethiopic , Thaana Canadian Syllabic (Latin alphabet co-official).
4-Logographic+syllabic: Pure logographic , Mixed logographic and syllabaries , Featural-alphabet + limited logographic , Featural-alphabet