<P> On November 18, 2010, UNESCO officially recognized angklung as a Masterpiece of Oral and Intangible Heritage of Humanity, and encourage Indonesian people and government to safeguard, transmit, promote performances and to encourage the craftsmanship of angklung making . </P> <P> The history of Southeast Asia has led to a wealth of different authors, from both within and without writing about the region . </P> <P> Originally, Indians were the ones who taught the native inhabitants about writing . This is shown through Brahmic forms of writing present in the region such as the Balinese script shown on split palm leaf called lontar (see image to the left--magnify the image to see the writing on the flat side, and the decoration on the reverse side). </P> <P> The antiquity of this form of writing extends before the invention of paper around the year 100 in China . Note each palm leaf section was only several lines, written longitudinally across the leaf, and bound by twine to the other sections . The outer portion was decorated . The alphabets of Southeast Asia tended to be abugidas, until the arrival of the Europeans, who used words that also ended in consonants, not just vowels . Other forms of official documents, which did not use paper, included Javanese copperplate scrolls . This material would have been more durable than paper in the tropical climate of Southeast Asia . </P>

Where is the population of mainland southeast asia concentrated