Glenn Randers-Pehrson: 
                All images using deflate, filter by rows, non-interlaced
arl_logo.png:	PNG image, 2 bit, 101 x 101, colormap RGB, 
                U.S. Army Research Laboratory logo
                converted from PostScript
opossum.png:	PNG image, 8 bit, 300 x 250, colormap RGB, 
                public domain photo of an opossum named "png"
rpfamily.png:	PNG image, 8 bit, 316 x 314, colormap RGB, 
                scanned photo
www_logo.png:	PNG image, 4 bit, 211 x 166, colormap RGB, 
                logo taken from WWW-3 conference announcement
bede.png:	PNG image, 1 bit, 571 x 633, grayscale, 
                converted from GIF