Software Updates
Rollup
A collection of previously issued patches and hotfixes, usually meant to be applied to one component of a device, such as the web browser or a particular service.
Service Pack
A larger compilation of operating system updates that can include functionality enhancements, new features, and typically all patches, updates and hotfixes issued p to the point of the release of the service pack.
Hotfix
A patch that is often issued on an emergency basis to address a specific security flaw.
Patch
A small unit of supplemental code meant to address either a security problem or a functionality flaw in a software package or operating system.