* ADDITIONAL_LOAD_PATHS
* ARGF
* ARGV
* ActionController
* ActionView
* ActiveRecord
* ArgumentError
* Array
* BasicSocket
* Benchmark
* Bignum
* Binding
* CGI
* CGIMethods
* CROSS_COMPILING
* Class
* ClassInheritableAttributes
* Comparable
* ConditionVariable
* Config
* Continuation
* DRb
* DRbIdConv
* DRbObject
* DRbUndumped
* Data
* Date
* DateTime
* Delegater
* Delegator
* Digest
* Dir
* ENV
* …