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.
PUK code is security code that protects your SIM card data. Your mobile phone asks for PUK code only when you have entered incorrect pin number three times. Once if your mobile starts asking for its PUK code then you can neither make a call nor send text from it.