Types of Insomnia. There are two types of insomnia: primary insomnia and secondary insomnia. 1  Primary insomnia: Primary insomnia means that a person is having sleep problems that are not directly associated with any other health condition or problem.
System of a Down's music has variously been termed alternative metal, nu metal, hard rock, progressive metal, thrash metal, art rock and avant-garde metal.
System of a Down - Mind; System of a Down - Highway Song; System of a Down - Streamline; System of a Down - War? System of a Down - Darts; System of a Down - Old School Hollywood; System of a Down - X; System of a Down - Pictures; System of a Down - Bounce; System of a Down - DDevil; System of a Down - Metro; System of a Down - Soil; System of a Down - NÃ¼guns; System of a Down - Jet Pilot