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Term usage in Austria 
In the Austrian usage of the term, Upper Styria (Obersteiermark) refers exclusively to the northwestern, generally mountainous and well wooded half of the federal state of Styria, the southwestern half of the state around the capital of Graz being known as Central Styria (Mittelsteiermark), which is further divided into Eastern and Western Styria (east and west of Graz).
The Obersteiermark consists of the districts of Murau, Liezen, Judenburg, Knittelfeld, Leoben, Bruck an der Mur and Mürzzuschlag. It is a generally rural region characterized by agriculture and tourism, except for the area between the towns of Judenburg and Mürzzuschlag, in the valley formed by the rivers Mur and Mürz, with extensive industrial sites.
Usage in Slovenia 
In Slovenian usage, the term Upper Styria (Zgornja Štajerska) refers to the whole Austrian state of Styria, as opposed to the region often called Lower Styria (Spódnja Štájerska or Slovenska Štájerska, mostly just Štájerska), the southern third of the former Duchy of Styria that after World War I was allotted to the Kingdom of Yugoslavia by the 1919 Treaty of Saint Germain and is today part of Slovenia.