Chemistry::Isotope contains the exact mass data from the table of the isotopes. It has an exportable function, isotope_mass, which returns the mass of an atom in mass units given its mass number (A) and atomic number (Z); and a function isotope_abundance which returns a table with the natural abundance of the isotopes given an element symbol.

The Math::VectorReal package defines a 3D mathematical "vector", in a way that is compatible with the previous CPAN module Math::MatrixReal. However it provides a more vector oriented set of mathematical functions and overload operators, to the MatrixReal package. For example the normal perl string functions "x" and "." have been overloaded to allow vector cross and dot product operations. Vector math formula thus looks like vector math formula in perl programs using this package.

This package contains (header) files for GNU GCC plugin development. It is only used for the development of GCC plugins, but not needed to run plugins.

This package contains (header) files for GNU GCC plugin development. It is only used for the development of GCC plugins, but not needed to run plugins.

This package contains (header) files for GNU GCC plugin development. It is only used for the development of GCC plugins, but not needed to run plugins.

This is the GNU C compiler, a fairly portable optimizing compiler for C.