Azerbaijan, a European country, designated by the 2-letter ISO 3166-1 country code

Azerbaijani language, designated by the ISO 639-1 international-standard language-code "az"

AstraZeneca, common abbreviation for the Anglo-Swedish pharmaceutical company

Alitalia, IATA airline designator for the national airline of Italy

AZ (football club), a Dutch football (soccer) club

Authority Zero, an Arizona punk rock band.

AZ (rapper), a rapper from Brooklyn, New York

Azimuth (as in "el-az", short for "elevation and azimuth"), the horizontal component of a compass direction

A-Z summary and related information.

A (Cyrillic), the first letter of the Early Cyrillic alphabet

Arizona (United States postal abbreviations)

that or the (definite article, pair of the indefinite an in English) in Hungarian language