The treatment of ‹e› ‹ai› ‹o› ‹au› is similar to Bengali, Malayāḷam, Sinhalese, Tamiḻ, Grantha and also to SE Asian scripts like Burmese, Khmer and Thai, but it differs clearly from Devanāgarī, Gujarātī, Gurmukhī, Kannaḍa, Telugu and Tibetan.
Oriya in Unicode
The Unicode range for Oriya is U+0B00–U+0B7F. Grey areas indicate non-assigned code points.
Oriya Unicode.org chart (PDF)
Brahmic family of scripts
The Brahmic or Indic scripts are a family of abugida (alphabetic-syllabary) writing systems. They are used throughout South Asia, Southeast Asia, and parts of Central and East Asia, and are descended from the Brāhmī script of the ancient Indian subcontinent. They are used by languages of several linguistic families: Indo-European, Dravidian, Tibeto-Burman, Mongolic, Austro-Asiatic, Austronesian, Tai, and possibly Korean (hangul). They were also the source of the dictionary order of Japanesekana.
An inscription in Old Tamil script (Vatteluttu)from the Later Chola period, circa 11th century AD. Old Tamil is a direct descendant of the Brahmi writing system
Brahmic scripts are descended from the Brahmi script. Brahmi is clearly attested from the 3rd century BCE during the reign of Ashoka, who used the script for imperial edicts, but there are some recent finds of earlier epigraphy in Tamil-Brahmi writing found on pottery in South India and Sri Lanka, dating back to the 6th century BCE or even earlier. Northern Brahmi gave rise to the Gupta script during the Gupta period, which in turn diversified into a number of cursives during the Middle Ages, including Siddham, Sharada and Nagari.
The Siddham (kanji: 悉曇, modern Japanese pronunciation: shittan) script was especially important in Buddhism because many sutraswere written in it, and the art of Siddham calligraphy survives today in Japan. The syllabic nature and dictionary order of the modern kana system of Japanese writing is believed to be descended from the Indic scripts, most likely through the spread of Buddhism.
Southern Brahmi evolved into Grantha and Old-Kannada Scripts among others, which in turn diversified into numerous scripts of Southeast Asia.
Bhattiprolu was a great centre of Buddhism during 3rd century BCE and from where Buddhism spread to east Asia. The present Telugu script is derived from Bhattiprolu Script or 'Kannada-Telugu script', also known as 'old Kannada script', owing to its similarity to the same.
Initially, minor changes were made which is now called Tamil brahmi which has far fewer letters than some of the other Indic scripts as it has no separate aspirated or voiced consonants. Later under the influence of Granta vetteluthu evolved which looks similar to present day Malayalam script. Still further changes were made in 19th and 20th centuries to make use of printing and typewriting needs before we have the present script.
Gari Ledyardhas hypothesized that the hangul script used to write Korean is based on the Mongol 'Phags-pa script, a descendant of the Brahmic family via Tibetan.
Halmidi Inscription Replica shows Kannada script which is thought to have emerged from Ashokan Brahmi around 4th or 3rd Century BCE as Proto-Kannada
Some characteristics, which may not be present in all the scripts are:
Each consonant has an inherent vowel which is usually short 'a' (in Bengali, Oriya, and Assamese, it is short 'ô' due to sound shifts). Other vowels are written by adding to the character. A mark, known in Sanskrit as a virama/halant can be used to indicate the absence of an inherent vowel.
Each vowel has two forms, an independent form when not part of a consonant, and a dependent form, when attached to a consonant. Depending on the script, the dependent forms can be either placed to the left of, to the right of, above, below, or on both the left and the right sides of the base consonant.
Consonants (up to 5 in Devanagari) can be combined in ligatures. Special marks are added to denote the combination of 'r' with another consonant.
Nasalization and aspiration of a consonant's dependent vowel is also noted by separate signs.
The traditional ordering can be summarized as follows: vowels, velar consonants, palatal consonants, retroflex consonants, dental consonants, bilabial consonants, approximants, sibilants, and other consonants. Each consonant grouping had four consonants (with all four possible values of voicing and aspiration), and a nasalised consonant.