The 21 national unions affiliated to the LO have almost 1,000,000 members of a Norwegian population of 5 million.

The majority of affiliated unions organizes traditional blue collar workers, but the largest affiliate is the Norwegian Union of Municipal and General Employees which makes up more than a third of all members.

It was named the Workers' National Trade Union (Norwegian: Arbeidernes Faglige Landsorganisasjon, AFL) from 1899 to 1957.

[3] The organization owns the Norwegian Labour Movement Archives and Library.

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