e/PAM graphics format

Information
has gloss	eng: The PAM graphics format of the Netpbm package generalises all the features of the previous formats (PBM, PGM and PPM) and provides for extending them. As well as width, height and maximum value, which are found in the older formats, PAM defines two new attributes: depth and tuple type.
lexicalization	eng: PAM graphics format
instance of	c/Graphics file formats