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volatile variable

   Also found in: Wikipedia 0.10 sec.
(programming)volatile variable - A variable in a computer program which can be modified by processes other than the program. For example, a variable that stores the value of a timer chip (either because it is located at the address of the hardware device or because it is updated on interrupts) needs to be volatile to be useful.

A static variable, on the other hand, maintains its value until the program changes it or it is no longer needed. In addition, volatile variables can be held in the stack whereas static variables are usually stored in a program's data segment.


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While PNW and APS's credit metrics are consistent with slightly higher rated peers, the ratings also reflect the potential negative financial impact and liquidity challenges resulting from high and volatile variable costs due to the utility's growing reliance on natural gas and purchased power, and provisions that limit recovery of power supply costs under APS's commission-approved Power Supply Adjustor (PSA).
Fitch Comments on PNW Subsidiary APS's Emergency PSA Rate Order by Business Wire
Offsetting these positive rating factors is the company's need to rely on Prudential for financial support in the competitive and volatile variable annuity market.
A.M. Best Upgrades Rating of American Skandia by Business Wire
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