I created a test document in each of those editors and then loaded each test document in each of the other editors. I showed what worked, what didn't, and made some suggestions on how interoperability could be improved. I found only two notable failures, when the Microsoft/CleverAge Add-in for Excel loaded KSpread and Symphony documents.
[Microsoft claims it cannot do better because lack of documentation. But the Open Office version is based upon the undocumented Excel version. Just proves closed source closes minds - Scott]
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