A flat fee, also referred to as a flat rate or a linear rate, refers to a pricing structure that charges a single fixed fee for a service, regardless of usage.[1] Less commonly, the term may refer to a rate that does not vary with usage or time of use.
Synchronous: interrupt occurs as a result of current process, otherwise asynchronous. User requested: interrupt occurs because of direct result by user task, otherwise coerced. Maskable: if desired the interrupt can be disabled by a user task, otherwise unmasked.
Interrupt Time. Interrupt time is the amount of time since the system was last started, in 100-nanosecond intervals. The interrupt-time count begins at zero when the system starts and is incremented at each clock interrupt by the length of a clock tick. The exact length of a clock tick depends on underlying hardware and can vary between systems.