Source : Free On-Line Dictionary of Computing

ELLA
     
        A hardware design language from DRA Malvern.  Implemented in
        {ALGOL68-RS}.
     
        E-mail: .  {SPARC version
        (ftp://src.doc.ic.ac.uk/packages/ELLA)}.
     
        ["ELLA 2000: A Language for Electronic System Design",
        J.D. Morison and A.S. Clarke, McGraw-Hill 1993].