> For the complete documentation index, see [llms.txt](https://whitepaper.ertha.io/ertha-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.ertha.io/ertha-whitepaper/game-mechanics/companies.md).

# Companies

Companies are the main instruments for materializing any resource or product in the game. Generally speaking, there are two groups of companies: resource group and products group. All companies have 5 levels for upgrading. Every company level adds an additional work slot for a new employee and their security status is increased.

### Resource Group Company:

Certain resources need certain factories, placed at certain locations where that resource is present. Example: If a player wants to produce Wood, they need a Wood factory, which must be built in a hexagon which has the Wood resource in it.

![Resources group company scheme](https://1773833194-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MhoMzShPGbuIZeOT5JX%2F-Mj4SX4tkXmMU5np6PDr%2F-Mj4_42I2O8HrdlW7U-5%2Fresource-group-company.png?alt=media\&token=e3131d4f-f016-4533-bcd1-633bbf488b56)

### Product Group Company:

The main difference between what resource and product companies produce, is that instead of using natural resources as inputs, a product company uses already harvested or extracted raw materials, that must be present in a company warehouse for the production to happen.

![Products group company scheme](https://1773833194-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MhoMzShPGbuIZeOT5JX%2F-Mj4SX4tkXmMU5np6PDr%2F-Mj4_aSa7x3ln0rhyofL%2Fproducts-group-company.png?alt=media\&token=34e982fb-e022-4118-aca6-e86e425bf14d)