Systems Software

Infrastructure software that is the building blocks or base platform for domain applications software or used by application developers. Examples include:

• Operating systems
• Compilers and interpreters
• DBMS implementations
• File systems
• Device drivers
• Graphics libraries
• Web and network server-infrastructure-related services
• API's that don't target a specific organization

Contrast this with domain applications (eg. payroll processing), and custom internal applications.

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Quasi-SystemsSoftware are tools that may cater to a domain or specific shop, but are more "core" to the applications. For example, an in-house GUI library that creates a customized view or version of a more general GUI library that fits shop conventions and needs better. Such tools are pre-digesting a vendor or "general purpose" GUI library to hide features not typically used by the shop and streamline for patterns heavily used by the shop.

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See SystemProgramming