Volume

bandwidth

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[common] Used by hackers (in a generalization of its technical meaning) as the volume of information per unit time that a computer, person, or transmission medium can handle. "Those are amazing graphics, but I missed some of the detail -- not enough bandwidth, I guess." Compare {low-bandwidth}; see also {brainwidth}. This generalized usage began to go mainstream after the Internet, population explosion of 1993-1994.
Attention span.
On {Usenet}, a measure of network capacity that is often wasted by people complaining about how items posted by others are a waste of bandwidth.