Solidity

1. Introduction to Smart Contracts

   The EVM, accounts, transactions, gas, and blocks.

2. Structure of a Contract

   State variables, functions, events, errors, and modifiers.

3. Types

   Value types, reference types, mappings, and data locations.

4. Units and Global Variables

   Ether units, block and msg globals, and ABI encoding functions.

5. Control Structures

   Function calls, error handling with revert and require, and try/catch.

6. Contracts

   Creation, visibility, inheritance, interfaces, libraries, and events.

7. Layout of State Variables in Storage

   Storage slot layout and packing.

8. Inline Assembly

   Yul-based inline assembly.

9. Security Considerations

   Reentrancy, gas limits, tx.origin, and common pitfalls.

10. Contract ABI Specification

    Function selectors and ABI encoding.

11. Using the Compiler

    solc usage, optimizer, and standard JSON.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.