iiO (or iio, pronounced "eye-oh") is a New York City based dance music act composed solely of producer/songwriter Markus Moser. Former members include vocalist/songwriter Nadia Ali, who left in 2005 to pursue a solo career. iiO are best known for their 2001 hit "Rapture", the lyrics to which were allegedly inspired by a meeting that occurred between Nadia Ali and an unidentified nightclub patron. The name iiO is derived from the Sony VAIO laptop name, on which the duo was creating much of their early work. The "Va" in Vaio was later dropped and replaced with an additional "i" to prevent any problems with Sony.

iiO followed up "Rapture" with several successful remixes of the track by producers John Creamer & Stephane K, Armin Van Buuren and Deep Dish. A large number of bootleg and white label remixes ensued, including a highly-sought Paul Van Dyk remix. After "Rapture" was released, the duo followed suit with "At the End" in 2003. The release featured remixes by The Scumfrog and Saeed & Palash.

iiO's first album, Poetica, had been delayed several times and was finally released independently in March 2005 on blank">Made Records, and released worldwide in June 2006. "_Smooth" was the first single released to promote the album, followed by "Runaway", "Kiss You", "Is It Love?".

In 2007, iio released Reconstruction Time: The Best Of iiO Remixed, a remix album which contains the single "Rapture 2007".

iiO (sometimes written as IIO, pronounced “eye-oh”) is a New York City based house music act consisting of producer/songwriter Markus Moser and singer/songwriter Nadia Ali . iiO are best known for their 2001 hit “ Rapture (Tastes So Sweet)”. The name iiO is derived from the Sony PC laptop model VAIO, on which the duo was creating much of their early work, and the duo was in fact first known as Vaiio. After “Rapture” was released, the duo followed suit with “ At the End ” in 2003.