Palm leaf manuscripts are manuscripts made out of dried palm leaves. They served as the paper of the ancient world in parts of Asia as far back as the 5th century BCE. and possibly much earlier.They were used to record actual and mythical narratives in South Asia and in South East Asia. Initially knowledge was passed down orally, but after the invention of alphabets and their diffusion throughout South Asia, people eventually began to write it down in dried and smoke treated palm leaves of Palmyra palm or talipot palm.
Once written down, each document had a limited time before which the document had to be copied onto new sets of dried palm leaves.[why?] With the spreading of Indian culture to South East Asian countries such as Indonesia, Cambodia, Thailand, and the Philippines, these nations became home to collections of documents in palm leaf.
In Indonesia the palm-leaf manuscript is called lontar. The Indonesian word 'lontar' was a misspelling of Old Javanese rontal. It is composed of two Old Javanese words, namely 'ron' (leaf) and 'tal' (tal tree). The word 'rontal' therefore means 'leaf of the tal tree'. The rontal tree belongs to the family of palm trees (Borassus flabellifer). Due to the shape of its leaves, which are spread like a fan, these trees are also known as 'fan trees'. The leaves of the rontal tree have always been used for many purposes, such as for the making of plaited mats, palm sugar wrappers, water scoops, ornaments, ritual tools, and writing material. Today, the art of writing in rontal still survive in Bali, performed by Balinese Brahmin as sacred duty to rewrite Hindu sacred texts.
With the introduction of printing presses in the early 19th century this cycle of copying from palm leaves came to an end. Many governments are making efforts to preserve what is left of their palm leaf documents.
The rounded or diagonal shapes of the letters of many of the scripts of southern India and Southeast Asia, such as Lontara, Javanese, Balinese, Oriya and Tamil are believed to have developed as an adaptation to writing on palm leaves, as angular letters tend to split the leaf.
Extracted from
http://en.wikipedia.org/wiki/Palm-leaf_manuscript