Ruby  2.0.0p451(2014-02-24revision45167)
Modules
Here is a list of all modules:
[detail level 12]
 Classes and their hierarchy.
 Defining methodsThere are some APIs to define a method from C
 Export Definitions
 Version Information
 Basic Types
 Node Styles
 Tokens
 Events
 Nodes
 Parser Definitions
 Emitter Definitions
 CRuby Embedding APIsCRuby interpreter APIs
 ruby(1) implementationA part of the implementation of ruby(1) command