Information Technology Reference
In-Depth Information
system are built on top of them. The layer contains the technologies to support features
such as location, iCloud, and social media.
The Core OS layer
The Core OS layer is the base layer and sits directly on top of the device hardware. This
layer deals with low-level functionalities and provides services such as networking (BSD
sockets), memory management, threading (POSIX threads), file system handling, external
accessories access, and inter-process communication.
