This is Help, the built-in documentation viewer for the SerenityOS desktop environment. If you prefer a command-line interface, the man(1) command offers a text-only view of the same library.
Documentation is divided into traditional Unix-style manual categories. Use the Browse tab on the left-hand side to navigate by category.
There's also a full-text search option under the Search tab.
If you want more information on the structure of the manual system, take a look at man(7).
Thank you for using SerenityOS Help!