OSE

from The Collaborative International Dictionary of English v.0.48

-ose \-ose\suff. [L. -osus: cf. F. -ose. Cf. {-ous}.]
   [1913 Webster]
   1. A suffix denoting full of, containing, having the
      qualities of, like; as in verbose, full of words; pilose,
      hairy; globose, like a globe.
      [1913 Webster]

   2. (Chem.) A suffix indicating that the substance to the name
      of which it is affixed is a member of the carbohydrate
      group; as in cellulose, sucrose, dextrose, etc.
      [1913 Webster]

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

OSE

   {Open Systems Environment}

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

OSE
       Open Software / System Environment