| (Double to TSystem) | Defines an implicit conversion of a Double value to a TSystem. |
| (TComplex to TSystem) | Defines an implicit conversion of a TComplex value to a TSystem. |
| (TDouble to TSystem) | Defines an implicit conversion of a TDouble value to a TSystem. |
| (TFraction to TSystem) | Defines an implicit conversion of a TFraction value to a TSystem. |
| (TInfinity to TSystem) | Defines an implicit conversion of a TInfinity value to a TSystem. |