rating
specification of safe or acceptable values of some property of a component or device
nominal voltage
specified representative voltage accepted or produced by a component in normal operation
thermal design power
specified amount of heat a computer component generates under normal conditions that the cooling system must dissipate
power rating
highest power input allowed to flow through particular equipment
shelf life
length of time that a commodity may be stored without becoming unfit for use or consumption
extra-low voltage
electrical safety classification of voltages lower than mains voltage which present a low shock risk
Water pollution classification (former Soviet Union)
Standard classification scale introduced in 1988 and presently enacted in Russia