OID

from The Collaborative International Dictionary of English v.0.48

-oid \-oid\ (-oid) suff. [Gr. ?, fr. e'i^dos form, akin to ? to
   see, and E. wit: cf. F. -o["i]de, L. -o["i]des.]
   A suffix or combining form meaning like, resembling, in the
   form of; as in anthropoid, asteroid, spheroid.
   [1913 Webster]

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

object identifier
OID

   <programming> (OID) Generally an implementation-specific
   {integer} or {pointer} that uniquely identifies an {object}.

   (1999-07-10)

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

OID
       Object IDentifier (OSI)

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