| %$% | Attribute and Environment Member Operators |
| %$%<- | Attribute and Environment Member Operators |
| %@% | Attribute and Environment Member Operators |
| %@%<- | Attribute and Environment Member Operators |
| EXTEND | Constructor Utilities |
| LIST | Constructor Utilities |
| object.model | Print Object Information |
| object.summary | Print Object Information |
| THAT | Self-Referencing Utilities |
| THEN | Self-Referencing Utilities |
| THIS | Self-Referencing Utilities |
| UNPACK | Unpack Named Lists |