Object Binding UnboundMethod Method Proc Struct Process::Status Time Dir File::Stat IO Range MatchData Regexp Hash Array Numeric ThreadGroup Continuation Thread Exception String FalseClass TrueClass Data Symbol NilClass Module SystemStackError StandardError LocalJumpError IOError RegexpError RangeError ZeroDivisionError ThreadError SystemCallError SecurityError RuntimeError NameError IndexError ArgumentError TypeError Struct::Tms File EOFError Bignum Integer Fixnum Float FloatDomainError NoMemoryError ScriptError SignalException fatal SystemExit NotImplementedError LoadError SyntaxError NoMethodError Interrupt Class