nos

from The Collaborative International Dictionary of English v.0.48

kimono \ki*mo"no\ (k[i^]*m[=o]"n[=o]; Jap. k[i^]m"[=o]*n[=o]),
   n.; pl. {-nos} (k[i^]*m[=o]"n[=o]z). [Jap., article of
   clothing, fr. ki to wear + mono thing.]
   1. A kind of loose robe or gown tied with a sash, worn as a
      traditional outer garment by Japanese women and men. Women
      may wear it with a broad sash called an {obi}, having a
      large bow in the back. At present (1998), most Japanese
      wear it only at home or on ceremonial occasions,
      western-style clothing being more common in the workplace.
      [Webster 1913 Suppl. +PJC]

   2. A similar gown worn as a dressing gown by women of Western
      nations.
      [Webster 1913 Suppl.]

from The Collaborative International Dictionary of English v.0.48

Ladino \La*di"no\, n.; pl. {-nos}
   1. The mixed Spanish and Hebrew language spoken by Sephardim.
      [Webster 1913 Suppl.]

   2. A cunningly vicious horse. [Southeastern U. S.]
      [Webster 1913 Suppl.]

   3. A ladin.
      [Webster 1913 Suppl.]

from The Free On-line Dictionary of Computing (8 July 2008)

Network Operating System
NOS

   <operating system> (NOS) The {operating system} on {Control
   Data Corporation}'s {Cyber Computer}.

   [Details?]

   (2002-11-22)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

NOS
       Network Operating System