1 When a business chooses to hire a temp agency as a permanent employee, the business must pay the temp agency a permanent staffing fee ranging from 10-25% of the employee's first-year salary. Some large organizations have in-house temporary agencies which apply similar fees for their services. 2  For example, the University of Washington charges a 29% markup, with department's paying $18.06 per hour for a temporary employee who actually earns $14 per hour.
Interrupt chaning is a technique used to restore and call all of the interrupt handlers that share that same interrupt number. This is done by saving the previus Interrupt Routine (IR) in a function pointer. Then, installing the new handler, and calling the previus interrupt handler whenever the new IR is called.
An interrupt is a signal (an interrupt request) generated by some event external to the CPU, which causes the CPU to stop what it is doing (stop executing the code it is currently running) and jump to a separate piece of code designed by the programmer to deal with the event which generated the interrupt request.