WordNet (r) 3.0 (2006):

NT
    n 1: an organization concerned to preserve historic monuments
         and buildings and places of historical interest or natural
         beauty; founded in 1895 and supported by endowment and
         private subscription [syn: National Trust, NT]

The Free On-line Dictionary of Computing (19 January 2023):

NT

   1. Network Termination.

   2. New Technology, as in Windows NT.