| Macro | Brief description | 
| MSG7 | Writes a message (with a 7-character message code) to the SYSOUT system file or  | 
| MSG7X | Writes a message (with a 7-character message code) to the SYSOUT system file or  | 
| MSGSHOW | Supplies information about the scope, number, language, names and access  | 
| MSGSINIT | System administration macro. | 
| MSGSMOD | System administration and user macro. | 
| MSGRC | Outputs the return code with an explanation for the macros of the messages | 
| OPSGEN | Supplies MIP with information about S variable generation | 
| TYPIO | Outputs a message on the operator console, and accepts a reply |