A 2015 study finds "a big jump" in pornography viewing over the past few decades, with the largest increase occurring between people born in the 1970s and those born in the 1980s.

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One recent entry into the free pornography website market are Thumbnail gallery post sites.

These are free websites that post links to commercial sites, providing a sampling of the commercial site in the form of thumbnail images, or in the form of Free Hosted Galleries—samplings of full-sized content provided and hosted by the commercial sites to promote their site.

These files could then be downloaded and then reassembled before being decoded back to an image.

Automated software such as Aub (Assemble Usenet Binaries) allowed the automatic download and assembly of the images from a newsgroup.

Internet pornography is any pornography that is accessible over the Internet, primarily via websites, peer-to-peer file sharing, or Usenet newsgroups.

The availability of widespread public access to the World Wide Web in late 1990s led to the growth of Internet pornography.Some free websites primarily serve as portals by keeping up-to-date indexes of these smaller sampler sites.These intents to create directories about adult content and websites were followed by the creation of adult wikis where the user can contribute their knowledge and recommend quality resources and links.The most common form of adult content is a categorized list (more often it's a table) of small pictures (called "thumbnails") linked to galleries.These sites are called a Thumbnail gallery post (TGP).Usenet newsgroups provided an early way of sharing images over the narrow bandwidth available in the early 1990s.