Subsystems

Subsystems

Images are composed of one or more subsystems. In a software product release, a subsystem is the smallest installable unit of software; the files that make up a subsystem cannot be installed individually (see "Patch Releases" for exceptions). Subsystems are assigned three-part names of the form product.image.subsystem. For example, ftn.sw.ftn and ftn.sw.utils are subsystems in the Fortran 77 Compiler product.