AEIOU

• a, e, i, o, u, a traditional list of vowel letters in the Roman alphabet
• A.E.I.O.U., a device used by the Habsburgs

• A.E.I.O.U. (album), a 2005 album by Sistars
• "AEIOU", a song on the debut album Waves and the Both of Us by Charlotte Sometimes
• "AEIOU (And Sometimes Y)", a song by Ebn Ozn
• "A.E.I.O.U.", a song by Zion I from Deep Water Slang V2.0
• A.E.I.O.U, a 1983 song by The Europeans
• "AEIOU" (Moana and the Moahunters song)
• "AEIOU" (Pnau and Empire of the Sun song)

• aeiou Encyclopedia, a free online collection of reference works in German and English about Austria-related topics
• Aeiou, a cartoon character featured in the older version of Muse magazine
• AEIOU, a graphic novel by cartoonist Jeffrey Brown
• AEIOU (film), a 1979 Czechoslovak film

• IOU

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