Estonian Soviet Socialist Republic, the name for the Republic of Estonia while under the rule of the Soviet Union (1940-1991, name changed in 1990).

Uzbek Soviet Socialist Republic, the name for the Republic of Uzbekistan while under the rule of the Soviet Union (1924-1991).

Latvian Soviet Socialist Republic, the name of Latvia while it was a member republic of the Union of Soviet Socialist Republics (1940-1941 and 1944-1991).

One of the 15 Soviet Socialist Republics that made up the former Soviet Union (1920-1991, name changed in 1990). Became independent as the Republic of Armenia in 1991, after the collapse of the USSR.

Lithuanian Soviet Socialist Republic, the name for the Republic of Lithuania while under the rule of the Soviet Union (1940-1991, name changed in 1990).

Abbreviation of Ukrainian Soviet Socialist Republic.

(historical) Abbreviation of Georgian Soviet Socialist Republic: the Republic of Georgia while under the rule of the Soviet Union (1936-1991, name changed in 1990).

(historical) A short-lived republic of the Soviet Union with its capital in Petrozavodsk (1940–1956).

(networking) Initialism of Secure Shell (a networking protocol by which two computers are connected via a secure channel.)

(US, military, nautical) Subsurface guided nuclear: a nuclear-powered submarine carrying and launching guided missiles