Using the JobTracker / Systemize API (version 5)
To learn about specific classes, properties, and methods of the JobTracker API, expand the namespaces in the table of contents viewer - or view the contents of the JobTrackerAPI5 namespace directly. Most of the interesting things you can do start with a method of the Connection class, so that's another good starting point.
For higher-level discussions of what you can do with the API, including samples and how to solve various problems, read the Developer Overview section of this site.