Tamil Traditional Number Sign at U+11FE9 marks that the following written form should be read as a traditional Tamil number. It is a printable symbol in the Tamil Supplement block, which contains historic Tamil fractions, weights, measures, and accounting signs rather than the ordinary modern Tamil letters. Its main use is in reproducing older Tamil documents where numbers were written with special Tamil numeric signs instead of Arabic digits. In palm-leaf manuscripts, ledgers, land records, temple accounts, almanacs, and scholarly editions, this sign helps distinguish a following numeral expression from surrounding words or measure names. Today it is mostly encountered in digitization, epigraphy, manuscript cataloging, and research on South Indian metrology and commerce. It may also appear in fonts and test data made to support the full Tamil Supplement repertoire. The chief practical concern is font availability: many everyday Tamil fonts focus on modern text and may not include these traditional numerical symbols.