* Ratio of the partial pressure or density of water vapor to the saturation pressure or density, respectively, at the same dry-bulb temperature and barometric pressure of the ambient air
* Ratio of the mole fraction of water vapor to the mole fraction of water vapor saturated at the same temperature and barometric pressure at 100% relative humidity, the dry-bulb, wet-bulb, and dew-point temperatures are equal
The amount of time from when an action is requested until the time that the request completes and is returned to the requestor
Performance neutral means that there is no significant difference in performance. For example, a performance neutral source code change would be one which would not have any significant impact on the performance as measured by the benchmark
The supply frequency range as declared by the manufacturer expressed by its lower and upper rated frequencies
The supply voltage range as declared by the manufacturer
Board that contains layers of circuitry used for interconnecting the other components
See air, return
Machine for imparting energy to a fluid, causing it to do work
* Centrifugal pump: Pump having a stationary element (casing) and a rotary element (impeller) fitted with vanes or blades arranged in a circular pattern around an inlet opening at the center. The casing surrounds the impeller and usually has the form of a scroll or volute
* Diaphragm pump: Type of pump in which water is drawn in and forced out of one or more chambers by a flexible diaphragm. Check valves let water into and out of each chamber
A platform with removable panels where equipment is installed with the intervening space between it and the main building floor used to house the interconnecting cables, which at times is used as a means for supplying conditioned air to the information technology equipment and the room
"N" represents the number of pieces to satisfy the normal conditions. Redundancy is often expressed compared to the baseline of "N." Some examples are "N+1," "N+2," "2N," and 2(N+1). A critical decision is whether "N" should represent just normal conditions or whether "N" includes full capacity during off-line routine maintenance. Facility redundancy can apply to an entire site (backup site), systems, or components. IT redundancy can apply to hardware and software