PBM handles the following black&white formats:

    Sun icon file				reading	writing
    X10 and X11 bitmap file			reading	writing
    MacPaint					reading	writing
    CMU window manager format			reading	writing
    MGR format					reading	writing
    Group 3 FAX					reading	writing
    GEM .img format				reading	writing
    Bennet Yee's "face" format			reading	writing
    Atari Degas .pi3 format			reading	writing
    Andrew Toolkit raster object   		reading	writing
    Xerox doodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes			reading
    ASCIIoodle brushes		