a00aa prints information about the version of the NAG Library in use.

a00ac provides a convenient means of checking the availability of a valid licence key on licence-managed implementations before starting computations that will use NAG Library methods. In particular, the use of this function is highly recommended in programs that call NAG Library methods within multithreaded sections (e.g., OpenMP parallel regions). The function need only be called once, before the start of the first multithreaded section.