The Collaborative International Dictionary of English v.0.48:

Interoperable \In`ter*op"er*a*ble\, a. (Computers)
   Being able to function in two or more different programs or
   operating systems. Used of data structures or executable
   programs; as, Microsoft Word files are interoperable between
   Intel and Macintosh operating environments..
   [PJC]

WordNet (r) 3.0 (2006):

interoperable
    adj 1: able to exchange and use information