Look up IOTA, iota, Ι, or ι in Wiktionary, the free dictionary.

Iota (Ι, ι) is the ninth letter of the Greek alphabet.

Iota or IOTA may also refer to:

Letters and scripts

• Ɩ or Latin iota, a letter of the Latin alphabet
• Iota (Cyrillic) (Ꙇ, ꙇ), a letter of the Cyrillic alphabet

Science and technology

• Infrared Optical Telescope Array
• Integrable Optics Test Accelerator — electron and proton low energy storage ring and test facility at Fermilab
• Iota toxin, a type of pore-forming toxin that acts to destroy the actin cytoskeleton.
• International Occultation Timing Association
• SARS-CoV-2 Iota variant, a variant of SARS-CoV-2, the virus that causes COVID-19

Mathematics

• Denoted by i, the Imaginary unit in the complex number system.

Computing

• ιn, a function generating a vector of every integer from 0 to n-1 (index origin zero) in APL
• Iota and Jot, two esoteric programming languages
• IOTA (technology), open-source distributed ledger (directed acyclic graph or DAG, a blockchain alternative)

Organizations

• International Ovarian Tumor Analysis trial and group, founded to develop standardized terminology
• Intra-European Organisation of Tax Administrations

Arts and entertainment

• Iota, a superhero in the comic book Heroes
• Colony Iota, a location in Xenoblade Chronicles 3
• Iota (singer), Australian singer and actor, born Sean Hape
• Iota, a syndicated newspaper comic strip by Mike Keefe and Tim Menees
• Iota, 2022 album by Lous and the Yakuza

Other uses

• Iota, Louisiana, a town in the US
• Iota (Italian ship), a vessel from the port of Naples, wrecked in December 1893
• Islands on the air (IOTA), a list of islands maintained by the Radio Society of Great Britain
• Hurricane Iota, a late-season Category 4 Atlantic hurricane in 2020