Almost any technology low in Apple's stack is called 'Core ...'. A quick search at developer.apple.com yields Core Animation, Core Video, Core Text, Core Graphics, Core Image, Core Data, JavaScriptCore, WebCore, Core Audio, Core Bluetooth, Core Foundation, and Core Media Framework.
That convention started with Mac OS X, when they had to somehow unite the low-level technologies of classic Mac OS and NextStep.
That convention started with Mac OS X, when they had to somehow unite the low-level technologies of classic Mac OS and NextStep.