What is "xeroxing"

Usage examples of "xeroxing".

It wasn't a total loss, even when you figure in the cost of Xeroxing form letters (one for right answers, one for wrong) and the postage and envelopes I got burned for, and the hours of work-time lost, and the wear and tear on my tongue (did you ever lick a thousand envelopes and several hundred stamps?

I considered the petty venality of triple-spacing paperwork to maximize buck-a-page Xeroxing, and wanted to vomit.