| GETENV() | Obtains system environmental settings. |
| SET() | Changes or evaluated enviromental settings |
| SETMODE() | Change the video mode to a specified number of rows and columns |
| SETTYPEAHEAD() | Sets the typeahead buffer to given size. |
| VERSION() | Returns the HARBOUR Version or the Harbour/Compiler Version. |
| __SETCENTURY() | Set the Current Century |
| __SetFunction() | Assign a character string to a function key |