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Answers and rating deltas for

How does facebook, gmail send the real time notification?

Author Votes Δ
Alistair Evans 251 0.00
Walter Macambira 8 0.00
ideawu 7 0.00
abhinav 3 0.00
Walter Caraza 3 0.00
Last visited: Sep 14, 2014, 5:07:29 AM