In , a task context (process, thread ...) is the minimal set of data used by this task that must be saved to allow a task interruption at a given date and a continuation of this task at the point it has been interrupted and at an arbitrary future date. The concept of context assumes significance in the case of interruptible tasks, wherein upon being interrupted, the processor saves the context and proceeds to serve the Interrupt service routine. Thus the smaller the context, the smaller is the latency. These data are located in: