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Sites containing thumbs that lead to galleries with video content are called MGP (Movie Gallery Post).
The main benefit of TGP/MGP is that the surfer can get a first impression of the content provided by a gallery without actually visiting it.
This small image archive contained some low quality scanned pornographic images that were initially available to anyone anonymously, but the site soon became restricted to Netherlands only access.
Usenet newsgroups provided an early way of sharing images over the narrow bandwidth available in the early 1990s.
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.Pornographic images had been transmitted over the Internet as ASCII porn but to send images over network needed computers with graphics capability and also higher network bandwidth.This was possible in the late '80s and early '90s through the use of anonymous FTP servers and through the Gopher protocol.Because of the network restrictions of the time, images had to be encoded as ascii text and then broken into sections before being posted to the Alt.binaries of the usenet.
These files could then be downloaded and then reassembled before being decoded back to an image.
The con presented a keynote by culture theorist Mark Dery and published a reader about the subject.