atto
{{wiktionary|atto|atto-}}
Atto may refer to:
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People
= Given name =
- Atto Melani (born 1626–1714), Italian opera singer
- Atto Mensah (born 1964), Sierra Leonean football player and coach
- Adalbert Atto of Canossa (died 988), Count of Canossa
- Atto (archbishop of Milan) (11th century)
- Atto (bishop of Vic) (died 971)
- Atto of Pistoia (1070–1153), Italian prelate
- Atto of Spoleto (7th century), Duke of Spoleto
- Atto of Vercelli (885–961), bishop of Vercelli
- Atto Tigri (born 1813–1875), Italian anatomist
= Surname =
- Osman Ali Atto (1940–2013), Somali warlord
Other uses
- Amazon Tall Tower Observatory, a scientific research facility in the Amazon rainforest of Brazil
- atto-, a metric prefix denoting a factor of 10{{sup|−18}}
- ATTO Technology, a computer electronics manufacturer
- Atto I, 1975 album by Al Bano and Romina Power
- BYD Atto 3, an electric car