consist preprocessor directives, let scripts partitioned, compile and execute a section of code exclusively for one of the supported platforms from the defined symbol we can get to know UNITY_EDITOR UNITY_EDITOR_WIN UNITY_EDITOR_OSX UNITY_STANDALONE_OSX UNITY_IPHONE UNITY_ANDROID UNITY_2_6 //unity engine version and so forth. complete information on unity help manual http://docs.unity3d.com/Manual/PlatformDependentCompilation.html
This is a blog that shares tips on Coding, Website, E-Commerce, Windows, Linux and IT related infos.