Base: Document manpage structure separately

This section is now removed from Help(1) and man(1).

4 files changed, 63 insertions, 32 deletions

diff --git a/Base/usr/share/man/man1/Help.md b/Base/usr/share/man/man1/Help.md
index 53fea0a553..2c505907a9 100644
--- a/Base/usr/share/man/man1/Help.md
+++ b/Base/usr/share/man/man1/Help.md
@@ -18,21 +18,6 @@ $ Help file
 `Help` is Serenity's digital manual, the GUI counterpart to `man`.
 It lets you search for and read manual pages (or "man pages").
 
-## Sections
-
-The SerenityOS manual is split into the following *sections*, or *chapters*:
-
-1. User Programs
-2. System Calls
-3. Library Functions
-4. Special Files
-5. File Formats
-6. Games
-7. Miscellanea
-8. Sysadmin Tools
-
-Sections are subject to change in the future.
-
 ## Examples
 
 To open Help:
@@ -62,4 +47,4 @@ this man page should be located at `/usr/share/man/man1/Help.md`.
 ## See Also
 
 * [`man`(1)](help://man/1/man) To read these same man pages from the terminal
-
+* [`man`(7)](help://man/7/man) For an overview on how manpages are organized
diff --git a/Base/usr/share/man/man1/man.md b/Base/usr/share/man/man1/man.md
index c85cb2b2e0..2a1e04651c 100644
--- a/Base/usr/share/man/man1/man.md
+++ b/Base/usr/share/man/man1/man.md
@@ -15,21 +15,6 @@ $ man section page
 or man pages for short, from the SerenityOS manual. You're reading
 the manual page for `man` program itself right now.
 
-## Sections
-
-The SerenityOS manual is split into the following *sections*, or *chapters*:
-
-1. User Programs
-2. System Calls
-3. Library Functions
-4. Special Files
-5. File Formats
-6. Games
-7. Miscellanea
-8. Sysadmin Tools
-
-Sections are subject to change in the future.
-
 ## Examples
 
 To open documentation for the `echo` command:
@@ -54,3 +39,5 @@ this man page should be located at `/usr/share/man/man1/man.md`.
 ## See Also
 
 * [`less`(1)](help://man/1/less) For the terminal pager that `man` uses by default
+* [`Help`(1)](help://man/1/Help) To read these same man pages in a GUI
+* [`man`(7)](help://man/7/man) For an overview on how manpages are organized
diff --git a/Base/usr/share/man/man7/Help-index.md b/Base/usr/share/man/man7/Help-index.md
index fae36fa866..4ae617b356 100644
--- a/Base/usr/share/man/man7/Help-index.md
+++ b/Base/usr/share/man/man7/Help-index.md
@@ -2,7 +2,7 @@
 
 ## Welcome to the SerenityOS on-line help system!
 
-This is **Help**, the built-in documentation viewer for the SerenityOS desktop environment. If you prefer a command-line interface, the [man](help://man/1/man) command offers a text-only view of the same library.
+This is **Help**, the built-in documentation viewer for the SerenityOS desktop environment. If you prefer a command-line interface, the [`man`(1)](help://man/1/man) command offers a text-only view of the same library.
 
 ---
 
@@ -10,6 +10,8 @@ Documentation is divided into traditional Unix-style manual categories. Use the
 
 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)`](help://man/7/man).
+
 ---
 
 Thank you for using ***SerenityOS Help!***
diff --git a/Base/usr/share/man/man7/man.md b/Base/usr/share/man/man7/man.md
new file mode 100644
index 0000000000..464a3e9a5f
--- /dev/null
+++ b/Base/usr/share/man/man7/man.md
@@ -0,0 +1,57 @@
+## Name
+
+man - SerenityOS manual system
+
+## Description
+
+The SerenityOS manual pages, or "man pages", document various parts of the operating system for users and developers. They are one of the two parts of the SerenityOS documentation.
+
+The other part of the SerenityOS documentation is the developer documentation, which can be found in the `Documentation` folder in the repository ([online link](https://github.com/SerenityOS/serenity/tree/master/Documentation)). The developer documentation is focused on setting up a SerenityOS installation and workflow, as well as contributing to its development.
+
+Note that documentation might cover standardized topics (such as standard POSIX C library functions) or SerenityOS-specific extensions (such as custom file formats). SerenityOS intends to be spec-complaint with industry standard specifications. Non-compliance with a particular specification should be documented in the relevant sections.
+
+### Programs
+
+There are three ways of accessing the manual pages:
+
+-   [`Help`(1)](help://man/1/Help) provides a graphical user interface for the man pages.
+-   [`man`(1)](help://man/1/man) implements the standard POSIX utility by accessing the man pages in the terminal.
+-   You can also choose to open the underlying Markdown files (see [Organization](#organization)) directly.
+
+### Organization
+
+Each SerenityOS manual page is a Markdown (.md) file under [`/usr/share/man`](/usr/share/man). The [main sections](#sections) live in the subdirectories `man1` through `man8`. Subsections are found within these directories.
+
+#### Sections
+
+The SerenityOS manual is split into the following _sections_, or _chapters_:
+
+1. User Programs - manuals for regular user applications and utilities
+2. System Calls - SerenityOS system call interface documentation
+3. Library Functions - SerenityOS C library function documentation
+4. Special Files - documentation for pseudo-files of the SerenityOS virtual file system
+5. File Formats - documentation for SerenityOS-specific file formats
+6. Games - manuals for SerenityOS games
+7. Miscellanea - various documentation that fits in no other category
+8. Sysadmin Tools - manuals for services and utilities intended for system administration
+
+Sections are subject to change in the future.
+
+#### Subsections
+
+Subsections exist to organize various large collections of topics within one main section. Subsections have their own pages (often a table of contents or general overview), so they are a category and a page at the same time. Subsections can be arbitrarily nested.
+
+The currently existing subsections are not listed here, as they are subject to frequent change.
+
+#### Naming
+
+Manpages are named via standard POSIX convention, where the section number follows the page name in brackets. For example, this page is called `man(7)`, but there's also a page called `man(1)` (the _program_ named `man`) and a page named [`Mitigations(7)`](help://man/7/Mitigations). This naming convention also applies to subsections.
+
+For pages in subsections, conventional directory notation with slashes is used. For example, the page `Widget-Button` in the subsection `GML(5)` has the full name `GML/Widget-Button(5)`.
+
+When you open a page via command-line arguments, the section is specified separately before the page name, for example `7 man`, `1 man`, or `7 Mitigations`.
+
+## See Also
+
+-   [`man`(1)](help://man/1/man) To read manpages in the terminal
+-   [`Help`(1)](help://man/1/Help) To read manpages in a GUI