| BASIC | XBasic | XBasic Comments |
| SADD() | &stringVar$ | |
| SCREEN() | ||
| SEEK() | SEEK() | |
| SEG | ||
| SELECT | SELECT | |
| SETMEM() | ||
| SGN() | SGN() | |
| SHARED | SHARED | |
| SHELL | SHELL() | |
| SIGNAL() | XstCauseException() | |
| SIN() | SIN() | Math function library |
| SINGLE | SINGLE | |
| SLEEP | XstSleep() | |
| SOUND | ||
| SPACE$() | SPACE$() | |
| SPC() | ||
| SQR() | SQRT() | Math function library |
| SSEG() | ||
| SSEGADD() | ||
| STACK() | ||
| STATIC | STATIC | SIMILAR (More intuitive, capable) |
| STEP | STEP | SAME |
| STICK() | ||
| STOP | STOP | |
| STR$() | STR$(), STRING$(), SIGNED$(), STRING() | |
| STRING | STRING | |
| STRING$() | CHR$() | |
| SUB | FUNCTION | |
| SWAP | SWAP | more capable |
| SYSTEM | SHELL() | |
| TAB() | TAB() | |
| TAN() | TAN() | Math function library |
| THEN | THEN | |
| TIME$() | XstGetDateAndTime() | |
| TIMER() | XstStartTimer() : XstKillTimer() | |
| TO TO | ||
| TYPE | TYPE | |
| UBOUND() | UBOUND() | |
| UCASE$() | UCASE$() | |
| UEVENT | ||
| UNLOCK | ||
| UNTIL | UNTIL | |
| UPDATE | ||
| USING | FORMAT$() | |
| VAL() | DOUBLE() | |
| VARPTR() | & | address operator |
| VARPTR$() | ||
| VIEW | - | See GraphicsDesigner |
| WAIT | ||
| WEND | ||
| WHILE | DO WHILE | |
| WIDTH | ||
| WINDOW | ===>> | See GraphicsDesigner |
| WRITE | WRITE | SIMILAR |
| XOR | XOR | More types |