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

# Overview

Cap consists of the six main modules:

1. [**Vault**](/concepts/vault.md): Stores reserve assets and issues cUSD tokens, providing liquidity to the Lender
2. [**Lender**](/concepts/lender.md): Handles borrowing, repayment, liquidation, and interest calculations
3. [**Fee Auction**](/concepts/fee-auction.md): Converts generated yield and fees to cUSD via a Dutch auction
4. [**Delegation**](/concepts/delegation.md): Connects to Shared Security Networks for delegated collateral, rewards, and liquidation
5. [**Oracles**](/concepts/oracles.md): Price oracles for asset valuation and rate oracles for interest calculations
6. [**Access Controls**](/concepts/access-controls.md): Function-level granular access controls across all protocol operations