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Old 01 May 2011, 10:16 PM
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Astra Astra is offline
Join Date: 29 September 2001
Location: San Francisco, CA
Posts: 8,257

I checked out Google's USENET archive. It would appear that "NSFW" caught on in late 2001 and early 2002. The first use of "NSFW" in a Fark headline appears in September of 2001. "Not safe for work" shows up on this archived Fark page from 2000.

NFBSK appears in archives during 2000. Here it is in a jargon list from the Straight Dope. The NFBSK section of the old ULMB appears to have been created in July 2000.
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