I shoot RAW files files instead of Jpeg. A Jpeg file is processed by the camera to produce a finished image ready to display. A RAW file is an unprocessed image coming directly from the camera's digital sensor. RAW files require you to be competent in computer editing since the image has to be developed before being used.
Digital RAW files are available for sale to art directors, editors, publishers, photo researchers, stock houses, advertising/public relations agencies and other interested individuals.