(abbr. OP), an Indo‐European language of western Iran (first millennium bc). Its writing is limited to royal inscriptions. The syllabic script has only 44 signs. The oldest extant and largest inscription is that of Bisitun. It is debated whether the script was invented by Darius I or had predecessors in western Iran. Most texts date from the reigns of Darius and Xerxes. Thereafter texts are scarcer and contain more errors. OP was the first cuneiform script to be deciphered.
Subjects: Classical Studies.