This is the class of mutually supportive groups of instances of ComputerProgram for a single general purpose. For example, a database management system is a collection of many instances of ComputerProgram that work together to store, retrieve, modify, and delete data.
| ||BerkeleySoftwareDistribution||Berkeley Software Distribution (UNIX), a version of Unix distributed by the University of California at Berkeley. Widely used as a standard for early versions of Unix and Unix software libraries.|
| ||MacOS||A Class, the subclasses of which are the different types of the OperatingSystems developed by Apple Computer to run its Macintosh line of Computers.|
| ||MicrosoftWindows||A Class, the subclasses of which are the different types of the related OperatingSystems developed by Microsoft Corporation to run Computers.|
| ||Solaris||The class of all instances of Solaris , a unix-based operating system for Sun SPARC computers. It includes the Open Look and Motif graphical user interfaces, OpenWindows (the Sun version of X Windows), DOS and Windows Emulation, and ONC networking.|
| ||SymbianOS||A Class, the subclasses of which are the different types of OperatingSystems developed by Symbian, Ltd., to run a variety of mobile devices such as MobileCellPhones.|