What class packages exist?

A set of utility packages including useful classes are part of the distribution.

Built-in packages such as ui, om and base, are part of the runtime system and can be referenced directly.

Extension packages such as util, os, com and xml need to be loaded explicitly with the IMPORT instruction, at the beginning of program modules.

Recent versions of the language support Java classes. Note that using Java will create a Java Virtual Machine (JVM) that will be part of the runtime system process.