Apple’s white paper

Getting started with Apple Pay

https://developer.apple.com/apple-pay/Getting-Started-with-Apple-Pay.pdf

 

Getting started with iBeacon

https://developer.apple.com/ibeacon/Getting-Started-with-iBeacon.pdf

 

iPad user Guide for iOS 8.3

https://manuals.info.apple.com/MANUALS/1000/MA1595/en_US/ipad_user_guide.pdf

 

iPhone user Guide for iOS 8.3

https://manuals.info.apple.com/MANUALS/1000/MA1565/en_US/iphone_user_guide.pdf