open source large OO data processing systems

From: Secret Squirrel (jon.paugh_at_insurity.com)
Date: 01/27/05 

Date: 27 Jan 2005 13:13:17 -0800

Hi,

Are there any open source examples of good OO design for data
processing systems? I see many advocates pushing OO, but my comrades
believe OO is limited to small systems and acedemia. Also, it's fine to
talk about OO for building a small painting program, but entirely
different for a large high-performance data processing system. Are
there any large, real world, data processing systems out there to look
at?

Thanks,

Jon Paugh