The PDF (portable document format) standard was created in the 1990s by Adobe cofounder John Warnock to make it possible for people to share reliably formatted documents across a wide range of ...

What's next, Crysis-in-a-CSV? First came Tetris, then Doom – and now a bare-bones Linux instance that boots inside a PDF.… ...

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The best free PDF reader apps do more than just act as a PDF viewer - any modern browser can do that. What I'm looking for is tools that go beyond that, offering commenting, collaboration, and ...