# Optional packages

This section gives an overview of the optional packages that extend
LAMMPS functionality. Packages are groups of files that enable a
specific set of features. For example, force fields for molecular
systems or rigid-body constraints are in packages. You can see the list
of all packages and \"make\" commands to manage them by typing \"make
package\" from within the src directory of the LAMMPS distribution. The
[Build package](Build_package) page gives general info on how to install
and uninstall packages as part of the LAMMPS build process.

::: {.toctree maxdepth="1"}
Packages_list Packages_details
:::