A2A is an Italian company.
A2A may also refer to:
- The Algonquin to Adirondacks Collaborative (A2A)
- The adenosine A2A receptor
- The UK Access to Archives (A2A) programme, see The National Archives (United Kingdom)#"Access to Archives"
- The A2A radio transmission mode, see Types of radio emissions#Low-speed data
- The Alaska-Alberta Railway Development Corporation (A2A Rail)
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