16. The system for publishing and distribution of claim 14 wherein: the host computer is capable of receiving one or more revisions to one or more segments of the one or more educational works, and storing the one or more revised segments to replace one or more previously stored segments.
14. A system for publication and distribution of educational materials, the system comprising: at least one host computer capable of receiving over a communications network one or more educational works from at least one author of the works, at least one of the educational works having a plurality of segments, storing the one or more educational works, receiving one or more selections made by an instructor from an instructor client computer of one or more of the plurality of segments, retrieving the selected segments of the educational works, producing a compilation of educational course materials containing the selected segments, distributing a copy of only the one or more individual segments of the compilation to a purchaser of the one or more segments wherein: a royalty is made payable to the at least one author of one of the segments of the compilation upon purchase of the segment.