Similar or identical systems as in Germany (where a Habilitation is required) are in place, e.g., in Austria, the German-speaking part of Switzerland (however in Switzerland the term is used as a more general honorary title in the Universities of Applied Sciences, the Fachhochschulen), as well as in Poland, Slovakia, Hungary and Slovenia.
In Poland, professor is an academic degree required to obtain the position of full (ordinary) professor. An extraordinary professorship is lower ranked, and does not require the professor title.
In some countries using the German-style academic system (e.g. Austria, Finland, Sweden), Professor is also an honorific title that can be bestowed upon an artist, scholar, etc., by the President or by the government, completely independent of any actual academic post or assignment.