MSSR meaning in Governmental ?

The Moldavian Soviet Socialist Republic (Romanian: Republica Sovietică Socialistă Moldovenească, Moldovan Cyrillic: Република Советикэ Сочиалистэ Молдовеняскэ) was one of the 15 republics of the Soviet Union which existed from 1940 to 1991. The republic was formed on 2 August 1940 from parts of Bessarabia, a region annexed from Romania on 28 June of that year, and parts of the Moldavian Autonomous Soviet Socialist Republic, an autonomous Soviet republic within the Ukrainian SSR.

After the Declaration of Sovereignty on 23 June 1990, and until 23 May 1991, it was officially known as the Soviet Socialist Republic of Moldova. From 23 May 1991 until the declaration of independence on 27 August 1991, it was renamed the Republic of Moldova while remaining a constituent republic of the USSR. Its independence was recognized on 26 December of that year when the USSR was dissolved.

Geographically, the Moldavian SSR was bordered by Romania to the west and Ukraine to the north, east, and south.