The Assamese alphabet (, Oxomiya bornomala) is a writing system of the Assamese language and is a part of the Bengali-Assamese script. This script was also used in Assam and nearby regions for Sanskrit as well as other languages such as Bodo (now Devanagari), Khasi (now Roman), Mising (now Roman), Jaintia (now Roman) etc. It evolved from Kamarupi script. The current form of the script has seen continuous development from the 5th-century Umachal/Nagajari-Khanikargaon rock inscriptions written in an eastern variety of the Gupta script, adopting significant traits from the Siddhaṃ script in the 7th century. By the 17th century three styles of Assamese alphabets could be identified (baminiya, kaitheli and garhgaya) that converged to the standard script following typesetting required for printing. The present standard is identical to the Bengali alphabet except for two letters, (ro) and (vo); and the letter (khya) has evolved into an individual consonant by itself with its own phonetic quality whereas in the Bengali alphabet it is a conjunct of two letters. The Buranjis were written during the Ahom dynasty in the Assamese language using the Assamese alphabet. In the 14th century Madhava Kandali used Assamese alphabets to compose the famous Saptakanda Ramayana, which is the Assamese translation of Valmiki's Sanskrit Ramayana. Later, Sankardev used it in the 15th and 16th centuries to compose his oeuvre in Assamese and Brajavali dialect, the literary language of the bhakti poems (borgeets) and dramas. The Ahom king Supangmung (1663–1670) was the first ruler who started issuing Assamese coins for his kingdom. Some similar scripts with minor differences are used to write Maithili, Bengali, Meithei and Sylheti. History The Umachal rock inscription of the 5th century evidences the first use of a script in the region. The script was very similar to the one used in Samudragupta's Allahabad Pillar inscription. Rock and copper plate inscriptions from then onwards, and Xaansi bark manuscripts right up to the 18th–19th centuries show a steady development of the Assamese alphabet. The script could be said to develop proto-Assamese shapes by the 13th century. In the 18th and 19th century, the Assamese script could be divided into three varieties: Kaitheli (also called Lakhari in Kamrup region, used by non-Brahmins), Bamuniya (used by Brahmins, for Sanskrit) and Garhgaya (used by state officials of the Ahom kingdom)—among which the Kaitheli style was the most popular, with medieval books (like the Hastir-vidyrnava) and sattras using this style.