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iPad Pro (1st generation) - Wikipedia
iPad Pro - Wikipedia
The History of the iPad—Every Generation of iPad in Order
iPad Pro 11-inch (1st generation) - Technical Specifications
Apple iPad Pro 12.9 (2015) - Full tablet specifications - GSMArena.com
iPad Pro: History, specs, pricing, review, deals, and rumors - 9to5Mac
iPad Pro (1st Gen) Review: A Tablet Full of Potential - Digital Trends
A brief history of the iPad, Apple's once and future tablet
Looking back at 10 years of the iPad, Apple's revolutionary tablet
iPad Pro (1st generation) - Apple Wiki