OSO meaning in International ?

Answer: What is Oposición Sindical Obrera mean?

Oposición Sindical Obrera ("Working Class Union Opposition", abbreviated OSO) was a clandestine trade union movement in Spain. OSO was originally tied to the Communist Party of Spain (PCE). Many of its members participated in vertical union elections of 1963 in order to infiltrate the official regime union, including Marcelino Camacho. OSO is considered the precedent for the Workers' Commissions (CCOO). In the mid 60's the PCE abandoned the OSO in favour of the more successful CCOO. When the PCE abandoned the organization the PCE (m-l), a 1964 maoist split of the PCE took over the OSO and transformed it in its affiliated union. OSO disappeared in 1977 when it was transformed in the Asociación Obrera Asambleista (AOA).

reference

Full Form	Category
Office of Satellite Operations	Academic & Science
Operating System Office	Business
Odenwald School in Ober	Community
Over Scan Operation	Computing
Originating Signaling Office	Computing
Object Space Object	Computing
Open Shift Origin	Computing
Open Stack Orchestration	Computing
Online Science Olympiad	Computing
On Site Optimization	General
Oxford Scholarship Online	General
Om Shanti Om	General
Other Significant Other	General
Online Sales and Operations	General
Onsala Space Observatory	General
Originating Screening Office	General
Open Source Objects	General
Office of Signals Operations	General
Open Source Only	General
Our Special Ones	General
Open Source Ortungssystem	General
Old South Offroad	General
Ontario Street Outlaws	General
Operational Support Officer	Governmental
Office of Security Operations	Governmental
Oposici? Sindical Obrera	International
OstS?Ost	International
Oposición Sindical Obrera	International
OstSüdOst	International
Other Significant Others	Messaging
Operational Support Office	Military and Defence
Ocean Systems Operation	Space Science
Orbiting Solar Observatory	Space Science
Outperform Stock Options	Stock Exchange