Stax can refer to:

• StAX, (Computer Programming) Streaming API for XML. An API for reading and writing XML in Java.
• Stax Earspeakers, a Japanese brand of electrostatic earspeakers
• Stax Records, an American record company
• STAf eXecution engine (STAX), a service available with Software Testing Automation Framework
• Lay's Stax, a brand of potato snack chips sold by Lay's
• Stax Inc., a management consulting firm

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