Socialism is a practical organizational model of human community. Communism is a theoretical target. Communism is also a highly developed state of individual consciousness. Communist party is not an interest group like parliamentary parties. In dialectic materialism contradictions in science and in practice will be solved on higher level.
Communist party represents higher level in a community.
Communist party does not prefer to participate directly in parliamentary politics. Yet co-operation with parliamentary parties and groups is possible. Communist have crucial responsibility when changing the world. 150th anniversary of Communist Manifesto was spent in 1998. Communists saw developement of capitalism and main guidelines of history already 150 years ago.