Here is the lowdown on StarOffice vs. OpenOffice.org:
StarOffice is based on the code base of OpenOffice.org and does add a view things that are not OpenSource, such as:
* an improved dictionary for spell checking,
* some better ability to read MS Office documents,
* a ClipArt library,
* a library of
document templates,
* technical support.
StarOffice is produced by Sun Microsystem, who did open source the code of the original product as OpenOffice.org after they bought the German maker of it, called StarDivision.
Sun Microsystems sells StarOffice primarily to large organizations that need support in moving wholesale from another office suite. They also offer document conversion.
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