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Back in the days of 80-column monitors, dot-matrix printers, and DOS, the PrintScrn key on your keyboard was a way to send the entire contents of the screen to an attached parallel or serial printer. These days, PrintScrn takes a snapshot of your open windows, then sends the file into a hidden temporary buffer as an uncompressed image.
Each screen shot for this story was taken by opening the necessary windows, pressing the PrintScrn key, then loading Microsoft Paint by clicking Start -> All P...