For a couple of years near the end of the 20th century, I was using camera film from the Seattle Film Works. As part of their service, they generated electronic format picture image files in some sort of proprietary format. The files came on 3-1/2-inch floppies and had the extension SFW. They also provided Windows software to display the images. I never bothered much with the image files but hung on to the floppies. Recently, I was browsing my older picture files and came across the SFW thingies....
