Under the section MODULES USED all modules that are used or needed have to be included using the #include- statement. When standard C-header files (example #include ) are used then these will have to be included first. After this, separated by an empty line, the include section follows for the local include files (example #include “can.h”). It is recommended to use an alphabetical ordering on the modules included, so that it not only looks better, but also allows for quickly finding out if a specific module is used or not.