> For the complete documentation index, see [llms.txt](https://docs.abacus.tech/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.abacus.tech/introduction-to-the-ennead.md).

# INTRODUCTION TO THE ENNEAD

- [Why Abacus?](https://docs.abacus.tech/introduction-to-the-ennead/why-abacus.md)
- [Zero-Emissions Model (Real-Yield)](https://docs.abacus.tech/introduction-to-the-ennead/why-abacus/zero-emissions-model-real-yield.md): How Abacus is able to achieve Yield without any emissions