Autonomous okrug (), occasionally also referred to as "autonomous district", "autonomous area", and "autonomous region", is a type of federal subject of Russia and simultaneously an administrative division type of some federal subjects. As of 2014, Russia comprises eighty-five federal subjects, of which four are autonomous okrugs. 

Originally called national okrug, this type of administrative unit was created in the 1920s and widely implemented in 1930 to provide autonomy to indigenous peoples of the North. In 1977, the 1977 Soviet Constitution changed the term "national okrugs" to "autonomous okrugs" in order to emphasize that they were indeed autonomies and not simply another type of administrative and territorial division. While the 1977 Constitution stipulated that the autonomous okrugs are subordinated to the oblasts and krais, this clause was revised on December 15, 1990, when it was specified that autonomous okrugs are subordinated directly to the Russian SFSR, although they still may stay in jurisdiction of a krai or an oblast to which they were subordinated before. 

In 1990, ten autonomous okrugs existed within the RSFSR. Between 2005 and 2008, the three autonomous okrugs in which the titular nationality constituted more than 30% of the population were abolished. Since then, three more have been abolished, leaving four.
What is the name of the administrative unit discussed here?
What was its original name?
What is it sometimes called?
When was it created?
What was it to provide?
When would it be widely used?
Why was the named changed?
Where was it changed?
When was it revised?
How many were in existence then?
How many were eliminated?
How many federal subjects are there?
Of these how many are the type of unit discussed?
Autonomous okrug
Autonomous okrug
national okrug
national okrug
autonomous district
autonomous district
1920s
1920s
provide autonomy to indigenous peoples of the North
provide autonomy to indigenous peoples of the North
1930
1930
1977
1977
1977 Soviet Constitution
1977 Soviet Constitution
1990
1990
ten
 ten
Six
three more have been abolished, leaving four.
eighty-five
eighty-five
three
three 