R_NaN R_NaInt R_NaReal R_NegInf R_PosInf R_NaString R_BlankString R_EvalDepth R_GlobalEnv R_Interactive R_MissingArg R_NilValue R_PreciousList R_tcldo R_UnboundValue R_Visible R_Bracket2Symbol R_BracketSymbol R_ClassSymbol R_CommentSymbol R_DimNamesSymbol R_DimSymbol R_DollarSymbol R_DotsSymbol R_DropSymbol R_LastvalueSymbol R_LevelsSymbol R_ModeSymbol R_NamesSymbol R_NaRmSymbol R_RowNamesSymbol R_SeedsSymbol R_TspSymbol ArrowCursor BlankCursor WatchCursor CaretCursor TextCursor HandCursor RConsole CharacterMode UserBreak