# Official Solidity Docs

Three things to read:

* [Layout of State Variables in Storage](https://docs.soliditylang.org/en/latest/internals/layout_in_storage.html)
* [Layout in Memory](https://docs.soliditylang.org/en/latest/internals/layout_in_memory.html)
* [Layout of Calldata](https://docs.soliditylang.org/en/latest/internals/layout_in_calldata.html)

We have worked through it in the "Ethereum and Solidity Deep Dive" section:

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Ethereum and Solidity Deep Dive
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