Computing
- NX bit, a term for marking parts of computer memory as "no execute"
- NX technology, a computer program that handles remote X Window System connections
- NX (Unigraphics), a CAD software product from Siemens PLM Software
- NX Cash, or Nexon Cash, a currency used in online games by Nexon to purchase items in the cash shop
- DRS/NX, a port of UNIX System V for ICL DRS and later servers
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