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

Yellow Box

    Apple Computer, Inc.'s new development
   platform for building desktop, server, and web
   applications.  Yellow Box is a rich object-oriented
   environment that is tightly integrated with Java and allows
   you to deploy applications across five platforms: Rhapsody,
   Rhapsody for Intel, Windows 95, Windows NT, and Mac OS.
   All Yellow Box-based products are an evolution of OpenStep -
   an operating system-independent, object-oriented application
   platform from NeXT.

   Integrating the cross-platform robustness of OpenStep with
   Apple's market-leading digital media and graphics technologies
   will differentiate the Yellow Box from other development
   platforms.

   "Yellow Box for Windows" is the run-time software
   (implemented as dynamically linked libraries) that allows
   Yellow Box applications to run under Windows 95 and
   Windows NT.  Applications that use it will feature a full
   native Windows user interface.

   (http://wais.sensei.com.au/macarc/appdir/1996/0077.html).

   (1997-10-15)