A2A (disambiguation)

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)
 * The A2A radio transmission mode, see Types of radio emissions
 * The Alaska-Alberta Railway Development Corporation (A2A Rail)