Irish Republican Socialist Movement

• the Irish [Republican Socialist Party], a Marxist–Leninist Irish republican political party formed in 1974 following a split in Official Sinn Féin.
• * the Irish National Liberation Army, the paramilitary wing of the IRSP.
• * the Republican Socialist Youth Movement, the youth wing of the IRSP.
• the Irish Republican Socialist Committees of North America, the representation of the IRSM in North America.