Netpbm is a toolkit for conversion of images between a variety of different formats, as well as to allow a few basic image operations. Netpbm is based on the widely spread Pbmplus package (release: 10 Dec 91). On top of that, a lot of improvements and additions have been made. After the latest release of Pbmplus, a lot of additional filters have been circulating on the net. The aim of Netpbm was, to collect these and to turn them into a package. This work has been performed by a group of programmers all over the world. WWW: http://netpbm.sourceforge.net/