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.
An interrupter, or parenthetical element, is any sentence element that interrupts the forward movement of a clause. An interrupter is set off from the clause it interrupts by parenthetical punctuation. Parenthetical elements vary in intensity, and their relative strength is indicated by the form of punctuation used to set them off. Sometimes, a weak parenthetical element needs no punctuation at all: ~I also doubt his story.