Category:ISO 15924:Avst

This category lists languages which use the Avestan script (or avestique in French), coded Avst or 134 in ISO 15924 since 2009-06-01 [typology: alphabet, unicameral; main direction: rtl], supported by Unicode since version 5.2 with the alias Avestan (ref. : Ch10.7). See also Wikipedia:en:ISO 15924:Avst, Wikidata:Q790681.
You can render that script on your system with the following fonts (in order of coverage): 'Noto Sans Avestan', sans-serif.