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Currently, I'm reading a photocopied version of Turing's famous article On Computable Numbers, With an Application to the Entscheidungsproblem.

This is the best photocopy of his paper that I can find; most other copies are of pretty low quality to the point that I can't distinguish between different characters. The e in the final m-config column on page 233 for example, looks exactly like a c on many copies (not the one I'm using though). I also have trouble distinguishing between the german capitol letters C and E later in his paper on page 238 and such. Is there any place where I can find a well copied version of the paper? Perhaps a book would have a nice copy.

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There is a very high resolution scan in the Turing Digital Archive, however it's presented via a flash player plugin which makes reading mildy awkward and doesn't seem to allow printing.

There are a handful of marginally nicer PDF copies than that Caltech one you link available online [1][2], however they all seem to have been drawn from the same photocopy at some point.

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    $\begingroup$ Blocking Javascript will get you access to the JPG files on turingarchive.org. That said, LaTeXing famous old articles would be a great community project. $\endgroup$ – Raphael♦ Jan 28 '15 at 11:10
  • $\begingroup$ Reference [2] above of PLMS at Oxford journals is the "official" source, it is the digital archive of the official journal where Computable Numbers was published. There is a "reprint" (with slightly different formatting) at Annual Review in Automatic Programming Volume 1, 1960, Pages 230–264, doi:10.1016/0066-4138(60)90045-8 which has slightly "fatter" font and might be better readable. Not open access though. $\endgroup$ – Hendrik Jan Jan 28 '15 at 12:18
  • $\begingroup$ @HendrikJan I can't even access this with my university license. Wow. $\endgroup$ – Raphael♦ Jan 28 '15 at 16:27
  • $\begingroup$ @Raphael This would seem like a great job for specialist OCR software and a lot of expertise. $\endgroup$ – Lembik Jan 28 '15 at 16:43
  • $\begingroup$ @Lembik OCR on mathematics? That way only madness lies, methinks. $\endgroup$ – Raphael♦ Jan 28 '15 at 18:51
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Stephen Hawking's collection God Created the Integers has that paper included, as well as a lot of other pivotal math papers.

EDIT: Here's a preview on Google Books.

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