> For the complete documentation index, see [llms.txt](https://openmetacity.gitbook.io/omc-v0.7-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://openmetacity.gitbook.io/omc-v0.7-en/platform.md).

# Platform

- [Core systems](https://openmetacity.gitbook.io/omc-v0.7-en/platform/core-systems.md)
- [Application system](https://openmetacity.gitbook.io/omc-v0.7-en/platform/core-systems/application-system.md)
- [Winner selection system](https://openmetacity.gitbook.io/omc-v0.7-en/platform/core-systems/winner-selection-system.md)
- [Virtual registration system](https://openmetacity.gitbook.io/omc-v0.7-en/platform/core-systems/virtual-registration-system.md)
- [Property NFT rating system](https://openmetacity.gitbook.io/omc-v0.7-en/platform/core-systems/property-nft-rating-system.md)
- [Rental reward system (Own2Earn)](https://openmetacity.gitbook.io/omc-v0.7-en/platform/core-systems/rental-reward-system-own2earn.md)
- [NFT Marketplace (TBU)](https://openmetacity.gitbook.io/omc-v0.7-en/platform/core-systems/nft-marketplace-tbu.md)
- [Sub systems](https://openmetacity.gitbook.io/omc-v0.7-en/platform/sub-systems.md)
- [Open Community](https://openmetacity.gitbook.io/omc-v0.7-en/platform/sub-systems/open-community.md)
- [DAO Building Upgrade System (TBU)](https://openmetacity.gitbook.io/omc-v0.7-en/platform/sub-systems/dao-building-upgrade-system-tbu.md)
- [Meta Bank System (TBU)](https://openmetacity.gitbook.io/omc-v0.7-en/platform/sub-systems/meta-bank-system-tbu.md)
- [Map System](https://openmetacity.gitbook.io/omc-v0.7-en/platform/sub-systems/map-system.md)
- [AI(TBU)](https://openmetacity.gitbook.io/omc-v0.7-en/platform/ai-tbu.md)
- [VR(TBU)](https://openmetacity.gitbook.io/omc-v0.7-en/platform/vr-tbu.md)
- [Chains](https://openmetacity.gitbook.io/omc-v0.7-en/platform/chains.md)