Some objects will disappear when the machine is rebooted, others will reappear. The former are called "transient" objects in the WPS and the latter are called "persistent" objects. Persistent objects are stored in the OS2.INI file and directory EAs.
When you close a work area or shut down the desktop, any opened objects are recorded in the OS2.INI file and restarted next time the desktop or work area is reopened. Persistence for all WPS objects, such as the system clock, programs and shadow copies, is handled by their classes.
The OS2.INI file implementation is critical to the WPS because it represents a single point of focus for the entire operating system. If it becomes corrupted the system will lose all the information about how to run programs, the associations between files and programs and which programs were previously running in the system.