## Background

Let's say humanity make a settlement in asteroids in order to mine them, what kind of human activity will be there?
* Mining (main activities)
* Mining supplies
* Food supply chain (either grow there or import)
* Transport
* Lodging
* ...

So, is there any classification of possible human activities? Most probably each of those activities will form an industry/business?!
If so, do we have industry classification?

## GICS (Global Industry Classification Standard)

This standard classified companies into 4 levels:
* 11 sectors
* 24 industry groups
* 69 industries
* 158 sub-industries

## Certainly, there are more than 1 standard

Yeah, countries also need their own taxonomy for their own purposes (tax, laws, etc.)

## References

* GICS on [wiki](https://en.wikipedia.org/wiki/Global_Industry_Classification_Standard), [GICS site](https://www.msci.com/our-solutions/indexes/gics)
* Other taxonomy [wiki](https://en.wikipedia.org/wiki/Industry_classification)