Organization for Total Advancement of Society (OTAS) is a non-government, nonreligious, non-political, non-profitable voluntary organization established in 2005. It was formed with the initiatives of some philanthropists lead by Md. Abdur Rashid along with some other social moderators who were vastly experienced in the field of Socioeconomic development for the vulnerable communities. OTAS is working to integrate and empower the distressed and vulnerable people like women, poor, underprivileged children, and persons with disabilities (PWD) into the mainstream of socio-economic condition with equal opportunities. The organization executes their operation with the help of some talented, skilled, and enthusiastic economist, managers and financial analyst. OTAS is a grassroots level rights-based organization focusing the area of intervention:

1. Skills development and Decent employment
2. Education
3. Safe migration and Reintegration
4. Livelihood promotion
5. Health and Nutrition
6. Climate change and Environment preservation
7. Emergency response and disaster management
8. Water sanitation and hygiene
9. Shelter
10. Gender and Justice