Before the 1980 coup, four main trade union federations with differing political orientations dominated the labor scene. The main union organization, the Confederation of Turkish Trade Unions ("Türkiye İşçi Sendikaları Konfederasyonu"—Türk-İş) was politically moderate, adhering to legal limits on its activities. The other major union group, the Confederation of Progressive Trade Unions of Turkey ("Türkiye Devrimci İşçi Sendikaları Konfederasyonu"—DİSK), originated from a faction of Türk-İş in 1967. DİSK was much smaller than Türk-İş but more militant. In addition, small numbers of workers belonged to the pro-Islamist Confederation of Turkish Just Workers' Unions ("Türkiye Hak İşçi Sendikaları Konfederasyonu"—Hak-İş) and the right-wing Confederation of Turkish Nationalist Workers' Unions ("Türkiye Milliyetçi İşçi Sendikaları Konfederasyonu"—MİSK).