Types of trade unions:
i) Craft unions:- It is an organisation of workers employed in a particular craft & trade or in a single craft or few occupations. Such organisation link together those workers who have similar skills craft training etc.
ii) Industrial unions:- Covers workers with a variety of skills employed in a single industry e.g. coal industry.
iii) Staff unions: The term staff union is popularly used to both craft & industrial union. It is organized the workers on the basis of craft working in the same industry.
iv) General Unions:- It is a organization which covers various industries & labourers having different skills.