The following is a list of built-in system variables, adapted from the help file:
| V1 | V2 | V3 | System Variable |
|---|---|---|---|
| Y | Y | n | CANCEL |
| Y | Y | Y | CSRX |
| Y | Y | Y | CSRY |
| n | n | Y | CSRZ |
| Y | Y | Y | DATE$ |
| Y | Y | n | ERL |
| Y | Y | n | ERR |
| n | n | Y | ERRLINE |
| n | n | Y | ERRNUM |
| n | n | Y | ERRPRG |
| Y | Y | Y | FALSE |
| Y | Y | Y | FREEMEM |
| Y | Y | n | FREEVAR |
| Y | Y | n | FUNCNO |
| n | n | A | HARDWARE |
| Y | Y | n | ICONPAGE |
| Y | Y | n | ICONPMAX |
| Y | Y | n | ICONPUSE |
| n | Y | n | KEYBOARD |
| Y | Y | n | MAINCNTH |
| Y | Y | n | MAINCNTL |
| n | n | Y | MAINCNT |
| Y | Y | n | MEM$ |
| n | n | Y | MICPOS |
| n | n | Y | MICSIZE |
| n | n | Y | MPCOUNT |
| n | n | Y | MPHOST |
| n | n | Y | MPLOCAL |
| n | Y | n | PACKAGE$ |
| n | Y | n | PRGNAME$ |
| Y | Y | Y | RESULT |
| n | Y | n | SPHITNO |
| n | Y | n | SPHITT |
| n | Y | n | SPHITX |
| n | Y | n | SPHITY |
| Y | Y | Y | SYSBEEP |
| Y | Y | Y | TABSTEP |
| Y | Y | n | TCHST |
| Y | Y | n | TCHTIME |
| Y | Y | n | TCHX |
| Y | Y | n | TCHY |
| Y | Y | Y | TIME$ |
| Y | Y | Y | TRUE |
| Y | Y | Y | VERSION |
The first three columns indicate whether the command is implemented in the corresponding version of SmileBasic: "Y" indicates the command is implemented, "n" indicates it is not and "Y" was added in a newer version.