simultaneous shipment

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

simultaneous shipment
simship

   <programming> (simship) The release of international,
   {localised} versions of software at the same time, or within a
   short period of time of the original release.

   Major software publishers can release as many as 30 different
   localised versions within a month or two of the original
   version.  These products may have thousands of pages of
   {documentation}.

   (1999-06-09)