What were the offices held by mikhail gorbachev as the leader of the soviet union?

These are just some of his positions in the Soviet Union.
1.  First Secretary to the Supreme Soviet in 1974 
2. He was appointed as a member of the Politburo last 1979. 
3. General Secretary of the Communist Party of the Soviet Union from 1985 until 1991.
4. General Secretary of the Politburo in 1985.5. He was the country's head of state from 1988 until 1991
6.  The First Party Secretary of the Stavropol Regional Committee