Generally speaking, the quantity of information capable of passing through any system. In imaging, the bandwidth may refer to the range of wavelengths of light that can pass through a filter. In computers, the bandwidth may refer to the speed—in cycles per second (hertz)—at which the central processing unit operates. In telecommunications, bandwidth refers to the information capacity—or the maximum frequency range—of a transmitted signal or communications link. In this latter sense, the size of the available bandwidth determines the type of communication link that is possible, be it voice, data, audio, video, etc.