PSO

PSO (Pohjoismainen Sähkö Oy) was a Finnish record company, among other things. It was founded by Oskar Rokkanen in 1929. It released music at least through Blue Master, Blue Master Special, Top Voice, Homocord, Odeon, Columbia, Parlophone and Finlandia. In 1981 Musiikki-Fazer became the new owner of PSO and the labels. The back catalog is currently owned by Warner Music Finland Oy.