resistor color code
a system of colors and numbers used to specify resistor values.
the range in which the actual measured resistance can be within (shown on the fourth band)
the amount of wattage a resistor can handle. Larger resistors can handle more power than smaller ones.
those digits that carry meaning contributing to its precision
the frequency which an engineered system or component fails. (% Failure rate per 1000 hour. This is rated assuming full wattage being applied to the resistors.)