How many types of sandboxes are there in Salesforce?

Related questions

1. What is a sandbox?
2. What is force com Salesforce?
3. What is the difference between Salesforce license and force Com license?
4. How do I log into my Salesforce Sandbox?
5. What is Salesforce Sandbox?
6. Is Salesforce trailhead free?
7. Where is Salesforce used?
8. How do I run a class in Salesforce?
9. What is a test class?
10. How much does Salesforce cost per month?

Tags

1. #pages
2. #provide
3. #reports
4. #triggers
5. #settings
6. #development
7. #tasks
8. #salesforce
9. #price
10. #enough
11. #object
12. #custom
13. #amount
14. #definitions
15. #storage
16. #kinds
17. #developer
18. #classes
19. #includes
20. #books
21. #which
22. #dashboards
23. #visualforce
24. #there
25. #sandboxes
26. #limited
27. #testing