All screenshots, shortcuts and other elements that are specific for Android Studio are based on Android Studio for OSX.
The main reason that OSX is being used is because it allows us to develop apps for both Android and iOS on the same machine. Other than that there is no reason to choose a particular OS other than your personal (or companies) preferences.
While the screenshots are based on Android Studio for OSX it is not too difficult for you to figure things out in case your OS is Windows or Linux.
Where needed the short cuts for Windows are mentioned as well.
In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their ...