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| I | SP(I) | u | definition |
| 1 | ITITLE | u | title for INPLT |
| 2 | FTITLE | u | title for TRIPLT |
| 3 | GTITLE | u | title for GPHPLT |
| 4 | LOGO | u | title for web browser tab |
| 5 | GRFILE | u | file for hard copy graphics output |
| 6 | RWFILE | u | save file for read/write commands |
| 7 | JRFILE | u | read file for journal command |
| 8 | JWFILE | write file for journal command | |
| 9 | BFILE | u | output file |
| 10 | JTFILE | temporary file for journal command | |
| 11 | IOMSG | error message string | |
| 12 | CMD | current command string |