The term Indus script (also Harappan script) refers to short strings of symbols associated with the Indus Valley Civilization, in use during the Mature Harappan period, between the 26th and 20th centuries BC. It is not generally accepted that these symbols form a script used to record a language, and the subject remains controversial. In spite of many attempts at decipherments and claims, it is as yet undeciphered, and no underlying language has been identified. There is no known bilingual inscription.

The Indus symbols have been assigned the ISO 15924 code "Inds".

The Wikipedia page is [1], which has a list of possible decipherment hypotheses, and there are various other websites, such as [2].