Thanks to the PlayStation 4, sales in Sony's Game & Network Services division increased 83.2 percent year-over-year to 309.5 billion yen ($2.77 billion) according to the company's consolidated financial results (PDF link) for the second quarter ended Sept. 30, 2014.

On a constant currency basis, a calculation designed to eliminate the effects from exchange rate fluctuations, sales increased 74 percent year-over-year for the quarter that began July 1, 2014. Sales to external customers,...

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