Abugida in the context of Romanization of Inuktitut

A writing system comprises a set of symbols, called a script, as well as the rules by which the script represents a particular language. The earliest writing appeared during the late 4th millennium BC. Throughout history, each independently invented writing system gradually emerged from a system of proto-writing, where a small number of ideographs were used in a manner incapable of fully encoding language, and thus lacking the ability to express a broad range of ideas.

Writing systems are generally classified according to how their symbols, called graphemes, relate to units of language. Phonetic writing systems – which include alphabets and syllabaries – use graphemes that correspond to sounds in the corresponding spoken language. Alphabets use graphemes called letters that generally correspond to spoken phonemes. They are typically divided into three sub-types: Pure alphabets use letters to represent both consonant and vowel sounds, abjads generally only use letters representing consonant sounds, and abugidas use letters representing consonant–vowel pairs. Syllabaries use graphemes called syllabograms that represent entire syllables or moras. By contrast, logographic (or morphographic) writing systems use graphemes that represent the units of meaning in a language, such as its words or morphemes. Alphabets typically use fewer than 100 distinct symbols, while syllabaries and logographies may use hundreds or thousands, respectively.

Devanagari (/ˌdeɪvəˈnɑːɡəri/ DAY-və-NAH-gə-ree; in script: देवनागरी, IAST: Devanāgarī, Sanskrit pronunciation: [deːʋɐˈnaːɡɐriː]) is an Indic script used in the Indian subcontinent. It is a left-to-right abugida (a type of segmental writing system), based on the ancient Brāhmī script. It is one of the official scripts of India and Nepal. It was developed in, and was in regular use by, the 8th century CE. It had achieved its modern form by 1000 CE. The Devanāgarī script, composed of 48 primary characters, including 14 vowels and 34 consonants, is the fourth most widely adopted writing system in the world, being used for over 120 languages, the most popular of which is Hindi (हिन्दी).

The orthography of this script reflects the pronunciation of the language. Unlike the Latin alphabet, the script has no concept of letter case, meaning the script is a unicameral alphabet. It is written from left to right, has a strong preference for symmetrical, rounded shapes within squared outlines, and is recognisable by a horizontal line, known as a शिरोरेखा śirorekhā, that runs along the top of full letters. In a cursory look, the Devanāgarī script appears different from other Indic scripts, such as Bengali-Assamese or Gurmukhi, but a closer examination reveals they are very similar, except for angles and structural emphasis.

Geʽez (/ˈɡiːɛz/ GEE-ez; Ge'ez: ግዕዝ, romanized: Gəʽəz, IPA: [ˈɡɨʕɨz] ) is an abugida used to write several Afro-Asiatic and Nilo-Saharan languages of Ethiopia and Eritrea. It originated as an abjad (consonantal alphabet) and was first used to write the Geʽez language, now the liturgical language of the Ethiopian Orthodox Tewahedo Church, the Eritrean Orthodox Tewahedo Church, the Eritrean Catholic Church, the Ethiopian Catholic Church, and Haymanot Judaism of the Beta Israel Jewish community in Ethiopia. In the languages Amharic and Tigrinya, the script is often called fidäl (ፊደል), meaning "script" or "letter". Under the Unicode Standard and ISO 15924, it is defined as Ge'ez text.

The Geʽez script has been adapted to write other languages, mostly Ethiopian and Eritrean Semitic, particularly Amharic in Ethiopia, and Tigrinya in both Eritrea and Ethiopia. It has also been used to write Sebat Bet and other Gurage languages and at least 20 other languages of Ethiopia. In Eritrea it has traditionally been used for Tigre and just recently for Bilen. The Geʽez script has also recently been used to write Anuak, and used in limited extent to write some other Nilo-Saharan Nilotic languages, including Majang languages. It was also used in the past to write some Omotic languages, including Wolaytta, Bench, Hamer, and Kafa.For the representation of sounds, this article uses a system that is common (though not universal) among linguists who work on Ethiopian Semitic languages. This differs somewhat from the conventions of the International Phonetic Alphabet. See the articles on the individual languages for information on the pronunciation.

The Brahmic scripts, also known as Indic scripts, are a family of abugida writing systems. They are descended from the Brahmi script of ancient India and are used by various languages in several language families in South, East and Southeast Asia: Indo-Aryan, Dravidian, Tibeto-Burman, Mongolic, Austroasiatic, Austronesian, and Tai. They were also the source of the dictionary order (gojūon) of Japanese kana.

Brahmi (/ˈbrɑːmi/ BRAH-mee; 𑀩𑁆𑀭𑀸𑀳𑁆𑀫𑀻; ISO: Brāhmī) is a writing system from ancient India that appeared as a fully developed script in the 3rd century BCE. Its descendants, the Brahmic scripts, continue to be used today across South and Southeastern Asia.

Brahmi is an abugida and uses a system of diacritical marks to associate vowels with consonant symbols. The writing system only went through relatively minor evolutionary changes from the Mauryan period (3rd century BCE) down to the early Gupta period (4th century CE), and it is thought that as late as the 4th century CE, a literate person could still read and understand Mauryan inscriptions. Sometime thereafter, the ability to read the original Brahmi script was lost. The earliest (indisputably dated) and best-known Brahmi inscriptions are the rock-cut edicts of Ashoka in north-central India, dating to 250–232 BCE. During the late 20th century CE, the notion that Brahmi originated before the 3rd century BCE gained strength when archaeologists working at Anuradhapura in Sri Lanka retrieved Brahmi inscriptions on pottery belonging to the 450-350 BCE period.

Writing systems are used to record human language, and may be classified according to certain common features.

Gurmukhī (Punjabi: ਗੁਰਮੁਖੀ [ˈɡʊɾᵊmʊkʰiː], Shahmukhi: گُرمُکھی) is an abugida developed from the Laṇḍā scripts, standardized and used by the second Sikh guru, Guru Angad (1504–1552). Commonly regarded as a Sikh script, Gurmukhi is used in Punjab, India as the official script of the Punjabi language.

The primary scripture of Sikhism, the Guru Granth Sahib, is written in Gurmukhī, in various dialects and languages often subsumed under the generic title Sant Bhasha or "saint language", in addition to other languages like Persian and various phases of Indo-Aryan languages.

The Tibetan script is a segmental writing system, or abugida, forming a part of the Brahmic scripts, and used to write certain Tibetic languages, including Tibetan, Dzongkha, Sikkimese, Ladakhi, Jirel and Balti. Its exact origins are a subject of research but is traditionally considered to be developed by Thonmi Sambhota for King Songtsen Gampo.

The Tibetan script has also been used for some non-Tibetic languages in close cultural contact with Tibet, such as Thakali and Nepali. The printed form is called uchen script while the hand-written form used in everyday writing is called umê script. This writing system is especially used across the Himalayan Region.

The Rañjanā script (Lantsa) is an abugida writing system which developed in the 11th century and until the mid-20th century was used in an area from Nepal to Tibet by the Newar people, the historic inhabitants of the Kathmandu Valley, to write Sanskrit and Newar (Nepal Bhasa). Nowadays it is also used in Buddhist monasteries in China, especially in the Tibetan Buddhist areas within the Tibet Autonomous Region, Sichuan, Yunnan, Qinghai and Gansu; Mongolia, and Japan. It is normally written from left to right but the Kutakshar form is written from top to bottom. It is also considered to be the standard Nepali calligraphic script.

The Odia script (Odia: ଓଡ଼ିଆ ଅକ୍ଷର, romanized: Oṛiā akṣara, also Odia: ଓଡ଼ିଆ ଲିପି, romanized: Oṛiā lipi) is a Brahmic script, mainly used to write the Odia language. To a lesser extent, it is also used to write Sanskrit and other regional languages. It is one of the official scripts of the Indian Republic. The script has developed over more than 1000 years from a variant of Siddhaṃ script which was used in Eastern India, where the characteristic top line transformed into a distinct round umbrella shape due to the influence of palm leaf manuscripts and also being influenced by the neighbouring scripts from the Western and Southern regions.

Odia is a syllabic alphabet or an abugida wherein all consonants have an inherent vowel embedded within. Diacritics (which can appear above, below, before, or after the consonant they belong to) are used to change the form of the inherent vowel. When vowels appear at the beginning of a syllable, they are written as independent letters. Also, when certain consonants occur together, special conjunct symbols combine the essential parts of each consonant symbol.