Name of the chairmen of USSR

According of wiki, the name of the chiarmen on the USSR is Mikhail Gorbachev:

The President of the Soviet Union (Russian: Президент Советского Союза, Prezident Sovetsky Soyuz), officially called President of the USSR (Russian: Президент СССР[1]) or President of the Union of the Soviet Socialist Republics (Russian: Президент Союза Советских Социалистических Республик)[3] was the head of state of the Soviet Union from 15 March 1990 to 25 December 1991. Mikhail Gorbachev was the only person to occupy the office. Gorbachev was also General Secretary of the Communist Party of the Soviet Union between March 1985 and August 1991. He derived an increasingly greater share of his power from his position as president until he finally resigned as General Secretary after the Soviet coup d'état attempt of 1991.From the mid-1970s on, all effective executive political power was in the hands of the General Secretary of the Communist Party of the Soviet Union, with the Chairman of the Presidium of the Supreme Soviet exercising largely symbolic and figurehead duties. Starting with Leonid Brezhnev in 1977, the last four General Secretaries simultaneously served as Chairmen of the Supreme Soviet during their time in office.During the election of the president several candidates were nominated, among leading contenders were KGB persona Vadim Bakatin and Premier Nikolai Ryzhkov.The Vice President of the Soviet Union was Gennady Yanayev, who briefly usurped Gorbachev as president in the 1991 attempted coup as leader of the State Committee of the State of Emergency.

For detail, pls. click: http://en.wikipedia.org/wiki/President_of_the_Soviet_Union