When Alex Ewing was a kid growing up in Purcell, Oklahoma, he knew how close he was to home based on which billboards he could see out the car window.…
Arrivedで体験してみる「ジオフェンシング」の実際 | TechCrunch Japan
When Alex Ewing was a kid growing up in Purcell, Oklahoma, he knew how close he was to home based on which billboards he could see out the car window.…
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