Explanation:

• Social Service League:
o It was founded in 1911 by Narayan Malhar Joshi, a leading member of the Servants of India Society.
o The objective of the league was “to collect and study social facts and discuss social problems with a view to forming public opinion on questions of social service” and to secure for the masses a better quality of life and work. The League opened a number of day and night schools, libraries, dispensaries and started boys’ clubs and scouts corps.
o Joshi was intimately associated with the league's working till 1955.

• All India Trade Union Federation:

•  It was founded by Narayan Malhar Joshi in 1931.
• V.V. Giri was its first president.
• By 1929, All India Trade Union Congress(AITUC) was the only central trade union. In 1930, there was a split in the AITUC on account of ideological differences which prompted the creation of AITUF under the leadership of Shri N.M. Joshi. o With the formation of AITUF, the strength of the AITUC was reduced to 21 unions with a membership of 94,000 only. Subsequently, In 1931, there was another rift in the AITUC due to the fundamental differences between the communist and the left wing unionists. The communists led by B.T. Ranadive and S.V. Deshpande formed a new organisation named Red Trade Union Congress (RTUC).
• The AITUF and the railway unions amalgamated with the National Federation of Labour (NFL) under the new name National Trade Union Federation (NTUF) in 1933.

• Ahmedabad Textile Labour Association (TLA):

• It was founded in 1918 , by Mahatma Gandhi along with Anasuya Sarabhai and Shankerlal Banker.
• It is also known as Majoor Mahajan Sangh. o With 14,000 workers on its rolls, it was one of the largest single trade unions of the time.
•  In 1917, textile workers in Ahmedabad were demanding a 50% hike in plague bonus. After a long battle based on non-violence, the mill owners finally relented and the victory led to the creation of the Majoor Mahajan Sangh.

• Girni Kamgar Union:

• It was founded in 1928 under the leadership of Shripad Amrit Dange.
•  Muzaffar Ahmed, PC Joshi and Sohan Singh Joshi were the other famous trade union leaders and communists of that time which influenced its formation.
• It superseded the 'Giri Kamgar Mahamandal' which was founded by A.A. Alve and G.R. Kasle in Mumbai.
• Girni Kamgar Mahamandal was split and the communists formed their own union, the Girni Kamgar Union during the general strike of 1928.
• It enabled them to dominate trade union movement. On 30 October 1928, the Girni Kamgar Union had a membership of 324; by the end of strikes in 1928 and 1929, it boasted to 54000 members.
• S.A. Dange was the general secretary of the Girni Kamgar Union during the strikes.
•  Marathi journal, Kranti, was the official organ of the Girni Kamgar Union.