Typographical conventions

The following typographical conventions are used in this book:


Highlights important notes, introduces special terminology, denotes internal cross-references, and citations.


Highlights interface elements, such as menu names. Denotes ARM processor signal names. Also used for terms in descriptive lists, where appropriate.


Denotes text that can be entered at the keyboard, such as commands, file and program names, and source code.


Denotes a permitted abbreviation for a command or option. The underlined text can be entered instead of the full command or option name.

monospace italic

Denotes arguments to commands and functions where the argument is to be replaced by a specific value.

monospace bold

Denotes language keywords when used outside example code.


At the end of a path name ... denotes that the directories of interest are below the last-specified directory name. The unspecified path names are usually those that are different between operating systems. For example:


In the middle of a path name ... denotes that additional directories exist between the directory names specified. The unspecified path names are usually version and build numbers and platform-specific directory names. For example:


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