Every software interrupt signal is associated with a particular interrupt handler. A scheduler often provides the ability to unblock a task from interrupt handler context. Another is to invoke a user-specified conflict handler. Otherwise, the default signal handler is executed. PCLATH must also be preserved by any interrupt handler. They must be able to obey the commands of their handler without hesitation. She was then assigned to as the Aircraft Handler and the Assistant Air Boss. Of course the call had been aborted in order to call the signal handler. Her mother, Sue, is a professional dog handler. They would be turned loose to move silently to a second handler. He also held a job as a baggage handler at Heathrow Airport. Playing point guard, he was their primary ball handler. Venomous snake handler Bill Haast used this method. A duct system often begins at an air handler. He has a "smooth shooting stroke" and is an adept ball handler and passer.