1 Black skin and Asian skin have thicker and more compact dermis than white skin. This is also why blacks and Asians have fewer facial wrinkles than whites.  Black skin has more casual lipids and more moisture in the stratum corneum than white skin.
A software development kit (SDK or  devkit ) is typically a set of software development tools that allows the creation of applications for a certain software package, software framework, hardware platform, computer system, video game console, operating system, or similar development platform.
SDK is a Development Kit, usually a client side library that facilitates usages of an API. An API is just the library/service definition and or documentation. â dietbuddha Aug 21 '11 at 5:50 see also Library vs. framework vs API? â gnat Jan 9 '16 at 6:27