: 326 pixels per inch (ppi) was chosen because, at a typical viewing distance, the human eye cannot distinguish individual pixels at this density. Primary Devices : This specification is foundational to: iPhone 4, 4S, 5, 5c, and 5s . iPad mini (2nd, 3rd, 4th, and 5th generations). 2. The "MP4" Connection: Video Support
: Recent studies, such as the Psycholinguistic Tripartite Graph Network (Paper 326 in the ACL Anthology), use "deep text" analysis (deep neural networks) to detect personality traits from online posts. 326 mp4
: Apple provides "deep" documentation on iPhone 5c and iPhone 4 specs, covering everything from the 326 ppi display to MP4 playback limits. : 326 pixels per inch (ppi) was chosen