The Old Sogdian script encompasses a group of related scripts used to represent Sogdian, an ancient Eastern Iranian language. Old Sogdian unifies the scripts used in short inscriptions on coins and vessels, the Ancient Letters and the Kultobe and Upper Indus inscriptions.

Old Sogdian contains 40 characters: 29 letters, 10 numbers, 1 heterogram.

The ordering of numbers follows the right-to-left directionality of the script.

This script is not currently recognized by  ISO 15924, but is included in ScriptSource for research purposes. If you have any information on this script, please add the information to the site. Your contributions can be a great help in refining and expanding the ISO 15924 standard.