Wikipedia disagrees:
http://en.wikipedia.org/wiki/Socialism_(Marxism)
In Marxist theory, socialism, lower-stage communism or the socialist mode of production, refers to a specific historical phase of economic development and its corresponding set of social relations that eventually supersede capitalism in the schema of historical materialism. Socialism is defined as a mode of production where the criterion for economic production is use-value, and is based on direct production for use coordinated through conscious economic planning, where the law of value no longer directs economic activity, and thus monetary relations in the form of exchange-value, profit, interest and wage labor no longer operate. Income would be distributed according to individual contribution. The social relations of socialism are characterized by the working-class effectively controlling the means of production and the means of their livelihood either through cooperative enterprises or public ownership and self management, so that the social surplus would accrue to the working class or society as a whole.
Although Karl Marx and Fredrick Engels wrote very little on socialism and neglected to provide any details on how it might be organized, numerous Marxists and neoclassical economists used Marx's theory as a basis for developing their own models and proposals for socialist economic systems.
Just the FACTS. Of course ... the usual REDEFINITIONS have since occurred, as has happened with many things originating out of Marxism.