1. Rai Stones was a database (Micronesia)

2. Quipu Knots was a database (South America)

3. Hawala is a database. (Islamicate)

4. Kula Rings was a database (Melanesia)

5. Clay Tokens was a database (Mesopotamia)

6. Caribou Credits was a database (Sub-Arctic)

7. Seal Share System was a database (Greenland)

8. Palembang Tin-Ingots was a database (Indonesia)

9. Yukaghir hunting-credit was a database (Siberia)

10. Pigeon-Post Tally was a database (Mediterranean)

11. Aboriginal Message Stik was a database (Australia)

12. Bridewealth & Cattle Ledgers is a database (Africa)

13. Ortoq Bullion Network was a database (Cent. Asia)

14. Ottoman Defter Register was a database (Balkans)

15. Knife Money Registries was a database (China)

16. Mnemonic Tallies was a database (Scandinavia)

17. Wampum Belts was a database (North America)

18. Cacao-Ledger was a database (Mesoamerica)

19. Shroff Networks was a database (India)

20. Tally Sticks was a database (England)

21. Bitcoin is an immutable database (Global)