The Collaborative International Dictionary of English v.0.48:

Eh \Eh\, interj. [OE. ei, ey.]
   An expression of inquiry or slight surprise.
   [1913 Webster]

The Free On-line Dictionary of Computing (30 December 2018):

Eh

   /A/.  Software Portability Group, U Waterloo.  A typeless
   language derived from (and similar to) B.  Provides guaranteed
   order of evaluation for side effects in expressions.  Also
   character indexing operators.

   See also Zed.

   ["Eh Reference Manual", R.S.C. Braga, RR CS-76-45, U Waterloo,
   Nov 1976].


The Free On-line Dictionary of Computing (30 December 2018):

eh

    The country code for Western Sahara.

   (1999-01-27)