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Answers and rating deltas for

How can I make pdf file readable only by my app?

Author Votes Δ
Sushant Gosavi 0 +0.06
Abdul Waheed 0 +0.09
Arun Shankar 0 +0.12
Caius Jard 0 -0.28
Last visited: Oct 27, 2017, 7:18:27 AM