| I | SP(I) | u | definition |
| 1 | ITITLE | u | title for INPLT |
| 2 | FTITLE | u | title for TRIPLT |
| 3 | GTITLE | u | title for GPHPLT |
| 5 | SHCMD | u | string for shell command |
| 6 | RWFILE | u | save file for read/write commands |
| 7 | JRFILE | u | read file for journal command |
| 8 | JWFILE | u | write file for journal command |
| 9 | BFILE | u | output file |
| 10 | JTFILE | u | temporary file for journal command |
| 11 | IOMSG | | error message string |
| 12 | CMD | | current command string |
| 13 | LOGO | u | logo for X-Windows display |
| 14 | BGCLR | u | background color for X-Windows display |
| 15 | BTNBG | u | button background color for X-Windows display |
| 18 | PSFILE | u | root name for PostScript files |
| 19 | XPFILE | u | root name for xpm files |
| 20 | BHFILE | u | root name for bh files |
| 21 | SGHOST | u | host name for SG display |