| ContextS | Object to link the libmsgque object with application specific data |
| CutCtxS | Local context of the acut tool |
| EventS | Pointer to a EventS object Tcl event object used to insert events into the Tcl event-queue |
| JoinCtxS | Local context of the ajoin tool |
| MqBufferAtomU | Union used to set or modify native data from an MqBufferS object |
| MqBufferLS | Object to manage an array of MqBufferS items |
| MqBufferS | Defines an object to store generic (e.g mixed typed) data |
| MqBufferU | Union for all data items supported by MqBufferS |
| MqS | Main libmsgque object |
| OptLAS | Storage for an index/argument pair used as array in OptLS |
| OptLS | Container for the OptLAS array |
| OptRS | Object to define an option |
| OptRU | Space for all supported option items |
| ServerCtxS | Local context of the server tool |
| SortCtxS | Local context of the asort tool |
| SortKeyS | Storage for the relation between key and the whole input line |
| StatCtxS | Statistic context object used to calculate the statistics |
| StatTimerS | Statistic timer object used to store date/time values for calculate the statistics |
