It seems there are at least 14 different artists under the name IO.

1) "iO" is the band formed by 3 of the 4 previous Guano Apes members (without singer Sandra Nasic) and singer Charles Simmons. Official homepage.

2) IO is a mostly instrumental, post-metal, math rock quartet from Birmingham, UK. Website.

3) Two talented music fans and DJ's are behind Ukrainian house music act 'iO': Alex Voznichenko and Artem Zhovtobriukh. Project launched in februari 2009 and since then gained attention from major house music jocks such as Joris Voorn and Bart Skils. (myspace.com/ioukraine)

4) IO is a 4 releases cheap records inhouse project with Erdem Tunakan, Patrick Pulsinger, Gerhard Potuznik and Umberto Gollini.

5) Io is a hardcore punk band from Pittsburgh, Pa, on Hope Records.

6) Io was a melodic death metal band from Nurmijärvi, Finland.

7) Io is a black metal band from the United States of America.

8) iO is the drum and bass DJ/producer from Minsk, Belarus.

9) io was an American rock band from North Carolina, relocated to San Francisco, CA, active from 2001-2005. Released the album "Where The Engines Lay" in 2003, Later renamed Dear Kerosene(2005-2006).

10) Io is an artist from Bellingham, WA who makes digital instrumental music and contributes to a pair project with Jon Spinelli called House of Leaves.

11) IO is an Experimental-Industrial/Terror-Noise group from Berlin, Germany.

12) Io is drone/ambient project of Jonas Laster (see also Father Io)

13) Io is an Austrian busker

14) Io is a experimental-ambient project based in Miami, then Washington, DC, then Toronto, and now in Miami again. Releases on Elegua Records include "Little Haiti Suite," "The Fat Albert Concert," and "Live @ the Ambient PiNG, Vol. 1."

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