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Re:ZIP and RAR support now available in the Google Docs Viewer by FaceKicker on Thursday July 14, 2011 @07:13PM (#2765586)
> The article doesn't really describe how they came to choose those two formats.

I'd guess it's because they're the most common file compression formats? The formats you mentioned are pretty obscure to most mainstream users.

Re:ZIP and RAR support now available in the Google Docs Viewer by aristidb on Thursday July 14, 2011 @08:57PM (#2765870)
.tar.gz is not that uncommon, I would say. And once you have .tar.gz, support for .tar.bz2 is trivial to add.
Re:ZIP and RAR support now available in the Google Docs Viewer by cdcarter on Friday July 15, 2011 @02:20AM (#2766479)
And I would say that if you are attempting to open an archive on Google Docs Viewer, it's probably an archive of documents, and I would say that almost all archives of documents are in .zip or .rar.
Re:ZIP and RAR support now available in the Google Docs Viewer by yuhong on Thursday July 14, 2011 @09:40PM (#2765957)
>.tar.gz is not that uncommon, I would say.

On Unix, as tar has been built-in to Unix for decades.

Re:ZIP and RAR support now available in the Google Docs Viewer by cema on Friday July 15, 2011 @12:33AM (#2766288)
And therefore OSX.
Re:ZIP and RAR support now available in the Google Docs Viewer by gnoupi on Saturday July 16, 2011 @10:53AM (#2770871)
It is uncommon to the regular user, though, who is probably the one targeted by this feature.