This was one of the most ironic things I found: <a href="https://s3.amazonaws.com/reviz-tutorials/The_Pirates_Code.pdf" rel="nofollow">https://s3.amazonaws.com/reviz-tutorials/The_Pirates_Code.pd...</a>
There's a whole collection of this kind of search engine query at Hackers for Charity:<p><a href="http://www.hackersforcharity.org/ghdb/" rel="nofollow">http://www.hackersforcharity.org/ghdb/</a>
You can find neat stuff by adding site: qualifiers as well, like:<p><a href="https://www.google.com/search?q=not+for+public+release+filetype:pdf+site:.mil" rel="nofollow">https://www.google.com/search?q=not+for+public+release+filet...</a><p>or<p><a href="https://www.google.com/search?q=top+secret+filetype:pdf+site:.gov" rel="nofollow">https://www.google.com/search?q=top+secret+filetype:pdf+site...</a><p>and<p><a href="https://www.google.com/search?q="five+eyes"+filetype:pdf+site:.mil" rel="nofollow">https://www.google.com/search?q="five+eyes"+filetype:pdf+sit...</a><p>etc.
There are even more "Top Secret" documents.<p><a href="https://www.google.com/search?as_q=&as_epq=not+for+public+release&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=&as_occt=any&safe=images&as_filetype=pdf&as_rights=&gws_rd=ssl#as_qdr=all&q=%22top+secret%22+filetype:pdf" rel="nofollow">https://www.google.com/search?as_q=&as_epq=not+for+public+re...</a><p>(The above is sarcasm).
Offtopic but am I the only one seeing this? <a href="http://i.imgur.com/3pnOXot.png" rel="nofollow">http://i.imgur.com/3pnOXot.png</a> I thought google moved away from that black bar.
This one was quite sad. The suicide of an inmate: <a href="http://www.drc.ohio.gov/public/after_action_castroA643371.pdf" rel="nofollow">http://www.drc.ohio.gov/public/after_action_castroA643371.pd...</a>
Isn't this one supposed to be public information anyways?:
<a href="http://www.oema.us/files/FBI-OFFICES.pdf" rel="nofollow">http://www.oema.us/files/FBI-OFFICES.pdf</a>
Not quite the same, but the results for <a href="https://www.google.com/search?q=Hyperlinking+to+the+Site+from+any+other+website+without+our+initial+and+ongoing+consent" rel="nofollow">https://www.google.com/search?q=Hyperlinking+to+the+Site+fro...</a> are interesting.
Priceless: <a href="https://www.amherst.edu/system/files/media/1349/Finalproj_s10.pdf" rel="nofollow">https://www.amherst.edu/system/files/media/1349/Finalproj_s1...</a><p>Kind of makes me want to take Geology there, sounds like a fun place.
This is pretty interesting. One did say "Not for Public Release UNTIL", so could presumably be intended, but in a lot of cases webmasters probably didn't think something would be found and indexed by Google wherever they put it. And were wrong.
They should have at least have set an owner password for these documents. (In practice, they are not effective preventing people to disregard limitation that you set on the document, but at least it'll exclude documents for indexing at least by Google.)
What's especially crazy about these are that so many have been cached by Google. Anyone can read these docs and only Google would ever have a record.