MAC AP, WebKit 1
https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DisplayWebContent/DisplayWebContent.html reference: https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/DisplayWebContent/Tasks/SimpleBrowsing.html#//apple_ref/doc/uid/20002025-CJBEHAAG
PowenKo, MAC AP, Google Spreadsheet Sample
source code: http://code.google.com/p/gdata-objectivec-client/
PowenKo, Mac Tutorial 50-1, System, Timer
http://joaomoreno.github.com/thyme/ sample code: timer_thyme
PowenKo, Mac APP tutorial 001- begin hello world
http://developer.apple.com/library/ios/#documentation/IDEs/Conceptual/xcode_quick_start/010-Tutorial_Using_Xcode_to_Write_Hello_World/hello_world_tutorial.html sample code: 001-Begin-Hello