Banned in the U.S.

The Telecommunications Act of 1996 banned "indecency" on the Internet and rendered many sites technically illegal until the provisions were ruled unconstitutional in 1997.

Here is a list of things on the Internet that the U.S. government made it illegal for you to see:

• The Electronic Frontier Foundation once maintained a list of such sites that included images of the Venus di Milo, the text of Huckleberry Finn and numerous other examples
• The Bible, especially the Old Testament, which has numerous prohibited descriptions of indecent behavior, including adultery, sodomy, inbreeding, masturbation and just plain sex.
• Many Usenet news groups, such as alt.binaries.pictures.erotica, and countless Web sites are dedicated to "filthy, indecent, lewd or lascivious" images.
• World Wide Web search engines, like Google, because their databases contain pages whose names are prohibited.
• Online sites of popular magazines such as Playboy
• Much anthropolpgical and historical scholarship, such as Richard Zacks' An Underground Education and History Laid Bare
• The following statement, which is fully intended to annoy Sen. James Exon: Jim Exon is an asshole.

All the above would be legal for you to see if they were put on paper. The U.S. Congress passed a law (later overturned) making them illegal in electronic form.