Atto

Atto can refer to:

Science

• atto-, the SI prefix for a number to the -18 power (for example, 1 * 10^-18m is equal to an attometre)
• ATTO dyes, a family of fluorescent dye molecules

People

First name

• Atto of Pistoia, the Italian prelate
• Atto of Vercelli, the bishop of Vercelli
• Adalbert Atto of Canossa

Surname

• Osman Ali Atto, the Somali warlord

Other

• ATTO Technology, a computer electronics manufacturer