F#

1. Tour of F#

   Values, functions, collections, types, and pattern matching in a quick tour.

2. Functions

   Let bindings, currying, closures, and function composition.

3. Records and Discriminated Unions

   Records, discriminated unions, and domain modeling.

4. Pattern Matching and Active Patterns

   Match expressions, patterns, and active patterns.

5. Collections

   Lists, arrays, sequences, maps, and sets.

6. Classes and Interfaces

   Classes, interfaces, inheritance, and object expressions.

7. Computation Expressions

   Builders for async, seq, and custom workflows.

8. Async and Tasks

   Async workflows and interop with Task.

9. Units of Measure

   Compile-time units for numeric values.

10. Type Providers

    Information-rich programming with type providers.

11. Modules and Namespaces

    Organizing code with modules and namespaces.

12. Interoperating with .NET

    Using .NET libraries and members from F#.

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