| 
                               Pool  | 
                           
                               Abstract data type for the simple and quick management of memory blocks of equal size.  | 
                        
| 
                               Exchange  | 
                           
                               Post office box for messages and for the synchronization of sender and receiver.  | 
                        
| 
                               Message  | 
                           
                               Abstract data type for quick and consistent exchange of information blocks between communication partners. Thereby no data are copied during transfer, but only reference counters and pointers are used.  | 
                        
| 
                               Flat  | 
                           
                               Abstract data type, providing simple and quick methods for managing key/value combination. Message objects are used as values. The keys are represented by data type CAA.IDENT.  | 
                        
| 
                               Block  | 
                           
                               Simple memory area.  | 
                        
| 
                               Ready List  | 
                           
                               Shows whether a task is ready for execution.  | 
                        
| 
                               BCB  | 
                           
                               Block Control Block  | 
                        
| 
                               PCP  | 
                           
                               Pool Control Block  | 
                        
| 
                               ECP  | 
                           
                               Exchange Control Block  | 
                        
| 
                               MCB  | 
                           
                               Memory Control Block  | 
                        
| 
                               FCB  | 
                           
                               Flat Control Block  | 
                        
| 
                               KCB  | 
                           
                               Key Control Block  | 
                        
| 
                               RLST  | 
                           
                               Ready List  |