| Symbols | 
| .hasSlot | Identify, Extract, or Replace Data in Objects With Slots | 
| .slotNames | Identify, Extract, or Replace Data in Objects With Slots | 
| A | 
| as | Generic Coercion Function | 
| C | 
| callGeneric | Call the Current Generic Function | 
| className | Class Name and Package | 
| E | 
| el | Extract or replace part of an object | 
| el<- | Extract or replace part of an object | 
| evalOnLoad | Set Actions For Package Loading | 
| evalqOnLoad | Set Actions For Package Loading | 
| existsFunction | Search Environments for a Function | 
| existsMethod | UNKNOWN | 
| extends | Inheritance Relationships Between Classes | 
| F | 
| formalArgs | Access to the Formal Argument Names | 
| G | 
| getClass | UNKNOWN | 
| getClassDef | Get the Definition of a Class | 
| getClasses | Get the Classes Defined in an Environment | 
| getFunction | Search Environments for a Function | 
| getGroupMembers | Find All the Functions Sharing a Particular Group | 
| getLoadActions | Set Actions For Package Loading | 
| getMethod | UNKNOWN | 
| getPackageName | Package name | 
| getRefClass | Reference Classes | 
| getSlots | Identify, Extract, or Replace Data in Objects With Slots | 
| H | 
| hasArg | Check for Argument Names | 
| hasLoadAction | Set Actions For Package Loading | 
| hasMethod | Search for a Method for a Generic Function | 
| I | 
| initRefFields | Reference Classes | 
| is | Inheritance Relationships Between Classes | 
| isClass | Test for a Class | 
| isGeneric | Determine Whether a Function is a Generic | 
| L | 
| languageEl | Extract or replace parts of expressions | 
| languageEl<- | Extract or replace parts of expressions | 
| N | 
| new | Generate a New Object | 
| P | 
| packageSlot | Class Name and Package | 
| Q | 
| Quote | Return an Unevaluated Expression | 
| R | 
| removeGeneric | Remove all the Methods for a Function | 
| removeMethod | Remove all the Methods for a Function | 
| removeMethods | Remove all the Methods for a Function | 
| S | 
| S3Class | S4 Classes that Contain S3 Classes | 
| S3Class<- | S4 Classes that Contain S3 Classes | 
| S3Part | S4 Classes that Contain S3 Classes | 
| S3Part<- | S4 Classes that Contain S3 Classes | 
| selectMethod | Get a Method for a Generic Function | 
| setAs | Generic Coercion Function | 
| setClass | Define or Re-Define a Class of Objects | 
| setGeneric | Create Generic Function | 
| setIs | Inheritance Relationships Between Classes | 
| setLoadAction | Set Actions For Package Loading | 
| setLoadActions | Set Actions For Package Loading | 
| setMethod | Define a Method for a Generic Function | 
| setPackageName | Package name | 
| setRefClass | Reference Classes | 
| showMethods | Show All Methods for the Specified Function | 
| slot | Identify, Extract, or Replace Data in Objects With Slots | 
| slotNames | Identify, Extract, or Replace Data in Objects With Slots | 
| substituteDirect | Substitute in an Expression | 
| V | 
| validObject | Validate S4 Object |