The NSF page on Last.fm includes shares at least three 'artists', a band, a broadcaster and a DJ duo:

1. US - NSF is an underground hip-hop producer from California that specializes in dreamlike excursions deep into the listener's subconscious. He has released four albums as of July 2012. 'The Sleep of Reason' (2014) is the latest. Official site: https://www.facebook.com/NSFHipHop.

2. NL - NSF (Nederlandsche Seintoestellen Fabriek) founded in 1923 and absorbed into Philips which had many historical recordings in its archives from its transmissions. These are again surfacing as digital releases, with some (as yet unidentified) artists attributed simply as, 'NSF'.

3. MX - NSF (not-so-famous) is a mexican duo formed in 2006 focused on House, Techno, Acid and Electro music. Formed by Jain aka. Rinchester and Zhino.
http://not-so-famous.com Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.