1. ASEAN - Association of Southeast Asian Nations
2. AU - African union
3. Andean Community
4. CIS - Commonwealth of Independent States

5. CSTO - Collective Security Treaty Organization

6. CoE - Council of Europe
7. EEA - European economic area
8. EU - European union
9. Eurozone
10. G20
11. G7
12. IMF - International Monetary Fund
13. Mercosur
14. NATO - North Atlantic Treaty Organization
15. OECD - Organisation for Economic Co-operation and Development
16. OPEC - Organization of the Petroleum Exporting Countries
17. OSCE - Organization for Security and Co-operation in Europe
18. Schengen area
19. UN - United Nations
20. V4 - Visegrad Four
21. WTO - World Trade Organization

The Collective Security Treaty Organization (CSTO; Russian: Организация Договора о коллективной безопасности, romanized: Organizatsiya Dogovora o kollektivnoy bezopasnosti; Russian: ОДКБ, romanized: ODKB) is an intergovernmental military alliance in Eurasia. CSTO consists of select post-Soviet states.

More information:

• Collective Security Treaty Organization