The RemoveSystem(system) function removes a system of units.

A system cannot be removed if it is the default system.

$\mathrm{with}\left(\mathrm{Units}\right)\:$

Automatically loading the Units[Simple] subpackage

$\mathrm{AddSystem}\left(\'\mathrm{FHF}\'\,\'\mathrm{check}\'\,\'\mathrm{furlong}\'\,\'{\mathrm{hundredweight}}_{\mathrm{long}}\'\,\'\mathrm{fortnight}\'\right)$

$\mathrm{UseSystem}\left(\'\mathrm{FHF}\'\right)$

$\mathrm{RemoveSystem}\left(\'\mathrm{FHF}\'\right)$

Error, (in Units:-RemoveSystem) the system `FHF` of units is currently set to the default (see ?UseSystem)

$\mathrm{UseSystem}\left(\'\mathrm{SI}\'\right)$

$\mathrm{RemoveSystem}\left(\'\mathrm{FHF}\'\right)$

$\mathrm{RemoveSystem}\left(\'\mathrm{SI}\'\right)$

Error, (in Units:-RemoveSystem) the system `SI` of units is currently set to the default (see ?UseSystem)

$\mathrm{RemoveSystem}\left(\'\mathrm{CGS}\'\right)$