System Of a Down
System of a down is an alternative rock band founded in southern California. This band consists of  four members: Serj Tankian the lead vocalist, John Dolmayan the drummer, Daron Malakian the backing vocals and the guitarist and Shavo Odadijan the bassist.System of a down is also known as SOAD.Both Serj Tankian and Daron Malakian attanded the school of Rose and Alex Pilibos Armenian School.In 1992 Serj Tankian and Daron Malakian formed a band named Soil.The band hired Shavo as a  rhythm guitarist in 1994.
This band wasn't successful and they split up. These three members formed a band named “Victims of a Down." Later they changed the name to "System of a Down". At the beginning of 1997 their temporary drummer was replaced with John Dolmayan.

In June 1998 System of a Down released their first album titled "System of a Down " which was an instant hit.
They continued releasing more albums over the years like Steal this Album (2001), Toxicity (2003), Hypnotize (2004) and Mezmerize (2006)..The band achieved the award of the best hard rock performance of their song B.Y.O.B in 2006

In May 2006 they announced that they are going on a break from the music scene,Tankian continued with his solo career.
While Daron and John formed a band called "Scars on Broadway".
On November 29, 2010 System of a Down announced that they reunited.

References: www.systemofadown.com