Projects that provide free content exist in several areas of  interest, such as software, academic literature, general literature,  music, images, video, and engineering.
Technology has reduced the cost of publication and reduced the entry  barrier sufficiently to allow for the production of widely disseminated  materials by individuals or small groups. Projects to provide free  literature and multimedia content have become increasingly prominent  owing to the ease of dissemination of materials that is associated with  the development of computer technology. Such dissemination may have been  too costly prior to these technological developments.
 
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