> For the complete documentation index, see [llms.txt](https://docs.squads.so/squads-v3-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.squads.so/squads-v3-docs/development/pdas.md).

# PDAs

The PDAs used in Squads are interconnected and rigorously dependent on each other. The four core PDA types used in Squads are:

* Multisig
* Transaction
* Instruction
* [Authority](/squads-v3-docs/development/authorities.md)