entropy of Indus inscriptions closely matched those of linguistic systems like the Sumerian logo-syllabic system, Rig Vedic Sanskrit etc., but they are careful to stress that by itself does not imply that the script is linguistic. A follow-up study presented further evidence in terms of entropies of longer sequences of symbols beyond pairs. However, Sproat argued that there existed a number of misunderstandings in Rao et al., including a lack of discriminative power in their model, and argued that applying their model to known non-linguistic systems such as Mesopotamian deity symbols produced similar results to the Indus script. Rao et al. argument against Sproat's arguments and Sproat's reply were published in Computational Linguistics in December 2010. The June 2014 issue of Language carries a paper by Sproat that provides further evidence that the methodology of Rao et al. is flawed. Rao et al. rebuttal of Sproat's 2014 article and Sproat's response are published in the December 2015 issue of Language. Encoding The Indus symbols have been assigned the ISO 15924 code "Inds". Michael Everson submitted a completed proposal for encoding the script in Unicode's Supplementary Multilingual Plane in 1999, but this proposal has not been approved by the Unicode Technical Committee. , the Script Encoding Initiative still lists the proposal among the list of scripts that are not yet officially encoded in the Unicode Standard (and ISO/IEC 10646). The Indus Script Font is a Private Use Areas (PUA) font representing the Indus script. The font was developed based on a corpus compiled by Sindhologist Asko Parpola in his book Deciphering the Indus Script. Amar Fayaz Buriro, a language engineer, and Shabir Kumbhar, a developer of fonts, were tasked by the National Fund for Mohenjo-daro to develop this font, and they presented it at an international conference on Mohenjo-daro and the Indus Valley Civilisation on 8 February 2017. See also Notes References Works cited Further reading Adapted from an address given at the inaugural function of the Indus Research Centre at the Roja Muthiah Research Library, Chennai, on 25 January 2007. External links How come we can't decipher the Indus script? Articles by Steve Farmer, including essays about the Indus script Indus script at Omniglot.com Bronze Age writing systems Indus Valley civilisation Linguistic history of India Linguistic history of Pakistan Obsolete writing systems Proto-writing Right-to-left writing systems Undeciphered writing systems Writing systems of Asia Writing systems without word boundaries