NS4 explained

NS4 may refer to:

Non-structural protein 4

New Shepard 4, a Blue Origin reusable space launch vehicle booster rocket (booster #4)
Blue Origin NS-4, a 2016 April 2 Blue Origin suborbital spaceflight mission for the New Shepard
RAF N.S. 4, a British NS class airship
Choa Chu Kang MRT/LRT station (station code: NS4) abbreviated as (NS4/BP1); Singapore
Uguisunomori Station (station code: NS04), Kawanishi, Hyōgo Prefecture, Japan
Higashi-Miyahara Station (station code: NS04), Kita-ku, Saitama, Japan
Toyota NS4 - a plug-in hybrid concept car unveiled at the January 2012 North American International Auto Show.

Bedford (provincial electoral district), constituency N.S. 04; Nova Scotia, Canada
Novelty seeking level 4, disorderliness
NS-4; a fictional robot from the 2004 film, "I, Robot"
Netscape Communicator - also known as Netscape 4, or NS4