"EvaluatorStart" is a front end token that starts the specified kernel.
EvaluationNotebook[] gives the notebook in which this function is being evaluated.
EvaluatorNames is a global option that specifies the kernels that are currently configured to perform evaluations.
WaitNext[{eid_1, eid_2, ...}] waits until the first evaluation represented by any of the eid_i finishes, then returns its result, the corresponding eid_i, and the list of ...
Debugger opens the control palette for the debugger.
Recall that connections to remote kernels, as opened by LaunchKernels, are represented as kernel objects. See the chapter Connection Methods for details. The commands in this ...
expr_1; expr_2; ... evaluates the expr_i in turn, giving the last one as the result.
PrivateEvaluationOptions -> {opt_1 -> val_1, opt_2 -> val_2} is an option for selections that specifies settings for evaluation-related suboptions.
Default Kernel specifies the default kernel for all calculations.
Notebook's Kernel specifies the kernel for a notebook.