What is "exo"

Exo or EXO may refer to:

• Exo (band), a South Korean and Chinese boy band
• Exo (album), a 2012 album by Gatekeeper
• eXo Platform, an open-source social collaboration software
• Enriched Xenon Observatory (EXO), a particle physics experiment
• Exo (novel), a novel in the Jumper series by Steven Gould
• Exo Inc, an American company that manufactures protein bars using cricket flour

Exo (; stylized as EXO) is a South Korean– Chinese boy group based in Seoul. Formed by S.M. Entertainment in 2011 , the group debuted in 2012 with twelve members separated into two subgroups, Exo-K and Exo-M, performing music in Korean and Mandarin, respectively. Exo rose to fame with the release of their first album XOXO (2013), which contained the breakthrough hit "Growl". XOXO was a critical and commercial success, winning both Disk Daesang at the 28th Golden Disk Awards and Album of the Year at the 15th Mnet Asian Music Awards. It eventually went on to sell over one million copies, putting Exo as the best-selling Korean artist in twelve years and earning them the title of "King of Male Idol Groups" for achieving such a feat as rookies. Their third EP Overdose (2014) made Exo the highest-charting Korean male act on the Billboard 200. Exo were later ranked the most influential celebrity by Forbes Korea for the year 2014. In 2015 Exo broke their previous Billboard record with the release of their second studio album Exodus, which became the highest charting album for a male K-pop group on the Billboard 200 as well the K-pop album with the highest first week sales. Exodus's title track "Call Me Baby" also earned the honor of becoming the first and only K-pop track to enter the Canadian HOT 100. Exodus later went on to sell more than one million copies, earning Exo the title "double million sellers." Their fourth EP Sing For You (2015) later broke Exodus's first week sales record by selling 267,900 copies in its first week. In early 2016, Exo was revealed to have again ranked as the most powerful celebrity by Forbes Korea for the year 2015. In June 2016, Exo released their third studio album Ex'Act which again broke the previous sales record set by Sing For You, by selling 522,372 copies in one week.

In May 2014, Kris filed a lawsuit against S.M. Entertainment to be removed from the group. Luhan followed suit in October 2014. In April 2015, Tao suspended his activities and subsequently followed suit in August 2015. Following their departures, Exo carried on with nine members. In July 2016, it was announced that the lawsuit between Luhan, Kris, and SM Entertainment had been settled and the two idols would maintain their contract with SM until 2022.

Exo is the debut album of Chicago-based electronic duo Gatekeeper. It was released in July 17, 2012 on Hippos in Tanks. The album was written in honor of the South Korean K-pop sensation EXO.

Exo is the fourth novel in the Jumper series by Steven Gould and the fifth in the Jumper universe. The first two novels— Jumper and Reflex—tell a connecting story of David and Millie, which is continued with their daughter, Cent, in Impulse and now Exo; while the fifth novel, Jumper: Griffin's Story, is the back-story for a character from the 2008 movie Jumper and is not associated with the story or characters in the novels.