# Language Reference

System Variables |

This section, when expanded, provides a list of all PxPlus system variables, arranged in alphabetical order. Each definition includes the correct syntax (showing associated parameters), values returned, a general description, examples, and cross references to related documentation where applicable.

Each variable is also identified as to whether it returns a string or numeric value.

#### Important Note:
All system variables have reserved three-character names.
To avoid potential conflicts with the reserved list and since PxPlus might include more three-character variables in future, it is best not to use three-character variable names in your applications.