how many environment in your company code example

Example: how many environment in your company

We have 6 different environment in my company. 
- 2 different Develop environment ==> for developers
- 2 different QA environment ==> for testers
- 1 stage environment ==> for regression
- 1 Pre-Production environment ==> for E2E test
- 1 UAT environment ==> for regression
- 1 Production environment ==> for end users (Real life)