| Type | Description | Examples |
|---|---|---|
| REAL | Any numeric value (integer or fractional) | 0 15 0.2253 |
| STRING | Any character string (including an empty string) | "0.2253" "This is a string" |
| LOGICAL | Either true or false (system constants) | $TRUE $FALSE |
| SEQUENCE | An ordered set of data elements of any type | {RPM,1200,CLW,MAXRPM,4000} {ON} {} |
| RECORD | Any major word | GOTO COOLNT FEDRAT |
| KEYWORD | Any minor word | RPM FLOOD CCLW |