International standard classifications were built to simplify the complex world of the business sector and analyse the international exchange of goods. Therefore they are less fitted to the classification of social economy organizations(SEO) and provision of services. Firstly this chapter examines where SEO are in these classifications and what are their interest and drawbacks . Secondly it tries to go beyond this standardisation to give a framework of the role of SEO to create social ties and their impact on the whole society