Loading a package, using the with command, makes the short form of its commands available. Loading the Units package additionally loads one of its three subpackages, corresponding to the currently selected mode (by default the Units:-Simple subpackage). This enables one of the three units environments - the simple, standard, or natural units environment. If you want to access the short form of the commands in the Units package, but stay in the default units environment rather than the simple, standard, or natural units environments, then you can load the Units:-CommandsOnly package.

$\mathrm{Units}:-\mathrm{GetUnits}\left(\mathrm{dimension}=\mathrm{length}\right)$

${\mathrm{\ångstr\öm}}_{\mathrm{standard}},{\mathrm{arpent}}_{\mathrm{PQ\_length}},{\mathrm{astronomical\_unit}}_{\mathrm{standard}},{\mathrm{barleycorn}}_{\mathrm{US\_survey}},{\mathrm{barleycorn}}_{\mathrm{standard}},{\mathrm{bicron}}_{\mathrm{standard}},{\mathrm{bohr}}_{\mathrm{Atomic}},{\mathrm{cable}}_{\mathrm{UK\_nautical}},{\mathrm{cable}}_{\mathrm{US\_nautical}},{\mathrm{calibre}}_{\mathrm{standard}},{\mathrm{chain}}_{\mathrm{Gunter}},{\mathrm{chain}}_{\mathrm{Gunter\_US\_survey}},{\mathrm{chain}}_{\mathrm{Ramsden}},{\mathrm{chain}}_{\mathrm{Ramsden\_US\_survey}},{\mathrm{chain}}_{\mathrm{UK\_nautical}},{\mathrm{cubit}}_{\mathrm{Sacred}},{\mathrm{cubit}}_{\mathrm{Talmudic}},{\mathrm{cubit}}_{\mathrm{US\_survey}},{\mathrm{cubit}}_{\mathrm{standard}},{\mathrm{digit}}_{\mathrm{US\_survey}},{\mathrm{digit}}_{\mathrm{standard}},{\mathrm{\ℓ}}_{\mathrm{US\_survey}},{\mathrm{\ℓ}}_{\mathrm{standard}},{\mathrm{fathom}}_{\mathrm{US\_survey}},{\mathrm{fathom}}_{\mathrm{standard}},{\mathrm{fermi}}_{\mathrm{standard}},{\mathrm{finger}}_{\mathrm{US\_survey}},{\mathrm{finger}}_{\mathrm{standard}},{\mathrm{foot}}_{\mathrm{PQ}},{\mathrm{foot}}_{\mathrm{US\_survey}},{\mathrm{foot}}_{\mathrm{standard}},{\mathrm{furlong}}_{\mathrm{US\_survey}},{\mathrm{furlong}}_{\mathrm{standard}},{\mathrm{hand}}_{\mathrm{US\_survey}},{\mathrm{hand}}_{\mathrm{standard}},{\mathrm{handbreadth}}_{\mathrm{Sacred}},{\mathrm{handbreadth}}_{\mathrm{Talmudic}},{\mathrm{hubble}}_{\mathrm{Julian}},{\mathrm{hubble}}_{\mathrm{tropical}},{\mathrm{inch}}_{\mathrm{US\_survey}},{\mathrm{inch}}_{\mathrm{standard}},{\mathrm{league}}_{\mathrm{US\_survey}},{\mathrm{league}}_{\mathrm{nautical}},{\mathrm{league}}_{\mathrm{standard}},{\mathrm{light\_year}}_{\mathrm{Julian}},{\mathrm{light\_year}}_{\mathrm{tropical}},{\mathrm{line}}_{\mathrm{US\_survey}},{\mathrm{line}}_{\mathrm{standard}},{\mathrm{link}}_{\mathrm{Gunter}},{\mathrm{link}}_{\mathrm{Gunter\_US\_survey}},{\mathrm{link}}_{\mathrm{Ramsden}},{\mathrm{link}}_{\mathrm{Ramsden\_US\_survey}},{\mathrm{marathon}}_{\mathrm{standard}},{\mathrm{meter}}_{\mathrm{SI}},{\mathrm{microinch}}_{\mathrm{standard}},{\mathrm{micron}}_{\mathrm{standard}},{\mathrm{mil}}_{\mathrm{US\_survey}},{\mathrm{mil}}_{\mathrm{standard}},{\mathrm{mile}}_{\mathrm{US\_survey}},{\mathrm{mile}}_{\mathrm{nautical}},{\mathrm{mile}}_{\mathrm{standard}},{\mathrm{nail}}_{\mathrm{US\_survey}},{\mathrm{nail}}_{\mathrm{standard}},{\mathrm{nautical\_mile}}_{\mathrm{SI}},{\mathrm{pace}}_{\mathrm{US\_survey}},{\mathrm{pace}}_{\mathrm{standard}},{\mathrm{palm}}_{\mathrm{US\_survey}},{\mathrm{palm}}_{\mathrm{standard}},{\mathrm{parsec}}_{\mathrm{standard}},{\mathrm{perch}}_{\mathrm{PQ\_length}},{\mathrm{perch}}_{\mathrm{US\_survey}},{\mathrm{perch}}_{\mathrm{standard}},{\mathrm{pica}}_{\mathrm{TeX}},{\mathrm{pica}}_{\mathrm{computer}},{\mathrm{pica}}_{\mathrm{printer}},{\mathrm{planck\_length}}_{\mathrm{planck}},{\mathrm{point}}_{\mathrm{TeX}},{\mathrm{point}}_{\mathrm{computer}},{\mathrm{point}}_{\mathrm{printer}},{\mathrm{pole}}_{\mathrm{US\_survey}},{\mathrm{pole}}_{\mathrm{standard}},{\mathrm{quadrant}}_{\mathrm{electrical}},{\mathrm{quadrant}}_{\mathrm{standard}},{\mathrm{rod}}_{\mathrm{US\_survey}},{\mathrm{rod}}_{\mathrm{standard}},{\mathrm{span}}_{\mathrm{Sacred}},{\mathrm{span}}_{\mathrm{Talmudic}},{\mathrm{span}}_{\mathrm{US\_survey}},{\mathrm{span}}_{\mathrm{standard}},{\mathrm{spat}}_{\mathrm{standard}},{\mathrm{step}}_{\mathrm{US\_survey}},{\mathrm{step}}_{\mathrm{standard}},{\mathrm{x\_unit}}_{\mathrm{copper}},{\mathrm{x\_unit}}_{\mathrm{molybdenum}},{\mathrm{yard}}_{\mathrm{US\_survey}},{\mathrm{yard}}_{\mathrm{standard}}$

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

Automatically loading the Units[Simple] subpackage

$\mathrm{GetUnits}\left(\mathrm{dimension}=\mathrm{length}\right)$

${\mathrm{\ångstr\öm}}_{\mathrm{standard}},{\mathrm{arpent}}_{\mathrm{PQ\_length}},{\mathrm{astronomical\_unit}}_{\mathrm{standard}},{\mathrm{barleycorn}}_{\mathrm{US\_survey}},{\mathrm{barleycorn}}_{\mathrm{standard}},{\mathrm{bicron}}_{\mathrm{standard}},{\mathrm{bohr}}_{\mathrm{Atomic}},{\mathrm{cable}}_{\mathrm{UK\_nautical}},{\mathrm{cable}}_{\mathrm{US\_nautical}},{\mathrm{calibre}}_{\mathrm{standard}},{\mathrm{chain}}_{\mathrm{Gunter}},{\mathrm{chain}}_{\mathrm{Gunter\_US\_survey}},{\mathrm{chain}}_{\mathrm{Ramsden}},{\mathrm{chain}}_{\mathrm{Ramsden\_US\_survey}},{\mathrm{chain}}_{\mathrm{UK\_nautical}},{\mathrm{cubit}}_{\mathrm{Sacred}},{\mathrm{cubit}}_{\mathrm{Talmudic}},{\mathrm{cubit}}_{\mathrm{US\_survey}},{\mathrm{cubit}}_{\mathrm{standard}},{\mathrm{digit}}_{\mathrm{US\_survey}},{\mathrm{digit}}_{\mathrm{standard}},{\mathrm{\ℓ}}_{\mathrm{US\_survey}},{\mathrm{\ℓ}}_{\mathrm{standard}},{\mathrm{fathom}}_{\mathrm{US\_survey}},{\mathrm{fathom}}_{\mathrm{standard}},{\mathrm{fermi}}_{\mathrm{standard}},{\mathrm{finger}}_{\mathrm{US\_survey}},{\mathrm{finger}}_{\mathrm{standard}},{\mathrm{foot}}_{\mathrm{PQ}},{\mathrm{foot}}_{\mathrm{US\_survey}},{\mathrm{foot}}_{\mathrm{standard}},{\mathrm{furlong}}_{\mathrm{US\_survey}},{\mathrm{furlong}}_{\mathrm{standard}},{\mathrm{hand}}_{\mathrm{US\_survey}},{\mathrm{hand}}_{\mathrm{standard}},{\mathrm{handbreadth}}_{\mathrm{Sacred}},{\mathrm{handbreadth}}_{\mathrm{Talmudic}},{\mathrm{hubble}}_{\mathrm{Julian}},{\mathrm{hubble}}_{\mathrm{tropical}},{\mathrm{inch}}_{\mathrm{US\_survey}},{\mathrm{inch}}_{\mathrm{standard}},{\mathrm{league}}_{\mathrm{US\_survey}},{\mathrm{league}}_{\mathrm{nautical}},{\mathrm{league}}_{\mathrm{standard}},{\mathrm{light\_year}}_{\mathrm{Julian}},{\mathrm{light\_year}}_{\mathrm{tropical}},{\mathrm{line}}_{\mathrm{US\_survey}},{\mathrm{line}}_{\mathrm{standard}},{\mathrm{link}}_{\mathrm{Gunter}},{\mathrm{link}}_{\mathrm{Gunter\_US\_survey}},{\mathrm{link}}_{\mathrm{Ramsden}},{\mathrm{link}}_{\mathrm{Ramsden\_US\_survey}},{\mathrm{marathon}}_{\mathrm{standard}},{\mathrm{meter}}_{\mathrm{SI}},{\mathrm{microinch}}_{\mathrm{standard}},{\mathrm{micron}}_{\mathrm{standard}},{\mathrm{mil}}_{\mathrm{US\_survey}},{\mathrm{mil}}_{\mathrm{standard}},{\mathrm{mile}}_{\mathrm{US\_survey}},{\mathrm{mile}}_{\mathrm{nautical}},{\mathrm{mile}}_{\mathrm{standard}},{\mathrm{nail}}_{\mathrm{US\_survey}},{\mathrm{nail}}_{\mathrm{standard}},{\mathrm{nautical\_mile}}_{\mathrm{SI}},{\mathrm{pace}}_{\mathrm{US\_survey}},{\mathrm{pace}}_{\mathrm{standard}},{\mathrm{palm}}_{\mathrm{US\_survey}},{\mathrm{palm}}_{\mathrm{standard}},{\mathrm{parsec}}_{\mathrm{standard}},{\mathrm{perch}}_{\mathrm{PQ\_length}},{\mathrm{perch}}_{\mathrm{US\_survey}},{\mathrm{perch}}_{\mathrm{standard}},{\mathrm{pica}}_{\mathrm{TeX}},{\mathrm{pica}}_{\mathrm{computer}},{\mathrm{pica}}_{\mathrm{printer}},{\mathrm{planck\_length}}_{\mathrm{planck}},{\mathrm{point}}_{\mathrm{TeX}},{\mathrm{point}}_{\mathrm{computer}},{\mathrm{point}}_{\mathrm{printer}},{\mathrm{pole}}_{\mathrm{US\_survey}},{\mathrm{pole}}_{\mathrm{standard}},{\mathrm{quadrant}}_{\mathrm{electrical}},{\mathrm{quadrant}}_{\mathrm{standard}},{\mathrm{rod}}_{\mathrm{US\_survey}},{\mathrm{rod}}_{\mathrm{standard}},{\mathrm{span}}_{\mathrm{Sacred}},{\mathrm{span}}_{\mathrm{Talmudic}},{\mathrm{span}}_{\mathrm{US\_survey}},{\mathrm{span}}_{\mathrm{standard}},{\mathrm{spat}}_{\mathrm{standard}},{\mathrm{step}}_{\mathrm{US\_survey}},{\mathrm{step}}_{\mathrm{standard}},{\mathrm{x\_unit}}_{\mathrm{copper}},{\mathrm{x\_unit}}_{\mathrm{molybdenum}},{\mathrm{yard}}_{\mathrm{US\_survey}},{\mathrm{yard}}_{\mathrm{standard}}$

$2\mathrm{Unit}\left(m\right)+5\mathrm{Unit}\left(\mathrm{ft}\right)$

$\frac{881}{250}⟦m⟧$

$\mathrm{restart}$

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

Automatically loading the Units package

$\mathrm{GetUnits}\left(\mathrm{dimension}=\mathrm{length}\right)$

${\mathrm{\ångstr\öm}}_{\mathrm{standard}},{\mathrm{arpent}}_{\mathrm{PQ\_length}},{\mathrm{astronomical\_unit}}_{\mathrm{standard}},{\mathrm{barleycorn}}_{\mathrm{US\_survey}},{\mathrm{barleycorn}}_{\mathrm{standard}},{\mathrm{bicron}}_{\mathrm{standard}},{\mathrm{bohr}}_{\mathrm{Atomic}},{\mathrm{cable}}_{\mathrm{UK\_nautical}},{\mathrm{cable}}_{\mathrm{US\_nautical}},{\mathrm{calibre}}_{\mathrm{standard}},{\mathrm{chain}}_{\mathrm{Gunter}},{\mathrm{chain}}_{\mathrm{Gunter\_US\_survey}},{\mathrm{chain}}_{\mathrm{Ramsden}},{\mathrm{chain}}_{\mathrm{Ramsden\_US\_survey}},{\mathrm{chain}}_{\mathrm{UK\_nautical}},{\mathrm{cubit}}_{\mathrm{Sacred}},{\mathrm{cubit}}_{\mathrm{Talmudic}},{\mathrm{cubit}}_{\mathrm{US\_survey}},{\mathrm{cubit}}_{\mathrm{standard}},{\mathrm{digit}}_{\mathrm{US\_survey}},{\mathrm{digit}}_{\mathrm{standard}},{\mathrm{\ℓ}}_{\mathrm{US\_survey}},{\mathrm{\ℓ}}_{\mathrm{standard}},{\mathrm{fathom}}_{\mathrm{US\_survey}},{\mathrm{fathom}}_{\mathrm{standard}},{\mathrm{fermi}}_{\mathrm{standard}},{\mathrm{finger}}_{\mathrm{US\_survey}},{\mathrm{finger}}_{\mathrm{standard}},{\mathrm{foot}}_{\mathrm{PQ}},{\mathrm{foot}}_{\mathrm{US\_survey}},{\mathrm{foot}}_{\mathrm{standard}},{\mathrm{furlong}}_{\mathrm{US\_survey}},{\mathrm{furlong}}_{\mathrm{standard}},{\mathrm{hand}}_{\mathrm{US\_survey}},{\mathrm{hand}}_{\mathrm{standard}},{\mathrm{handbreadth}}_{\mathrm{Sacred}},{\mathrm{handbreadth}}_{\mathrm{Talmudic}},{\mathrm{hubble}}_{\mathrm{Julian}},{\mathrm{hubble}}_{\mathrm{tropical}},{\mathrm{inch}}_{\mathrm{US\_survey}},{\mathrm{inch}}_{\mathrm{standard}},{\mathrm{league}}_{\mathrm{US\_survey}},{\mathrm{league}}_{\mathrm{nautical}},{\mathrm{league}}_{\mathrm{standard}},{\mathrm{light\_year}}_{\mathrm{Julian}},{\mathrm{light\_year}}_{\mathrm{tropical}},{\mathrm{line}}_{\mathrm{US\_survey}},{\mathrm{line}}_{\mathrm{standard}},{\mathrm{link}}_{\mathrm{Gunter}},{\mathrm{link}}_{\mathrm{Gunter\_US\_survey}},{\mathrm{link}}_{\mathrm{Ramsden}},{\mathrm{link}}_{\mathrm{Ramsden\_US\_survey}},{\mathrm{marathon}}_{\mathrm{standard}},{\mathrm{meter}}_{\mathrm{SI}},{\mathrm{microinch}}_{\mathrm{standard}},{\mathrm{micron}}_{\mathrm{standard}},{\mathrm{mil}}_{\mathrm{US\_survey}},{\mathrm{mil}}_{\mathrm{standard}},{\mathrm{mile}}_{\mathrm{US\_survey}},{\mathrm{mile}}_{\mathrm{nautical}},{\mathrm{mile}}_{\mathrm{standard}},{\mathrm{nail}}_{\mathrm{US\_survey}},{\mathrm{nail}}_{\mathrm{standard}},{\mathrm{nautical\_mile}}_{\mathrm{SI}},{\mathrm{pace}}_{\mathrm{US\_survey}},{\mathrm{pace}}_{\mathrm{standard}},{\mathrm{palm}}_{\mathrm{US\_survey}},{\mathrm{palm}}_{\mathrm{standard}},{\mathrm{parsec}}_{\mathrm{standard}},{\mathrm{perch}}_{\mathrm{PQ\_length}},{\mathrm{perch}}_{\mathrm{US\_survey}},{\mathrm{perch}}_{\mathrm{standard}},{\mathrm{pica}}_{\mathrm{TeX}},{\mathrm{pica}}_{\mathrm{computer}},{\mathrm{pica}}_{\mathrm{printer}},{\mathrm{planck\_length}}_{\mathrm{planck}},{\mathrm{point}}_{\mathrm{TeX}},{\mathrm{point}}_{\mathrm{computer}},{\mathrm{point}}_{\mathrm{printer}},{\mathrm{pole}}_{\mathrm{US\_survey}},{\mathrm{pole}}_{\mathrm{standard}},{\mathrm{quadrant}}_{\mathrm{electrical}},{\mathrm{quadrant}}_{\mathrm{standard}},{\mathrm{rod}}_{\mathrm{US\_survey}},{\mathrm{rod}}_{\mathrm{standard}},{\mathrm{span}}_{\mathrm{Sacred}},{\mathrm{span}}_{\mathrm{Talmudic}},{\mathrm{span}}_{\mathrm{US\_survey}},{\mathrm{span}}_{\mathrm{standard}},{\mathrm{spat}}_{\mathrm{standard}},{\mathrm{step}}_{\mathrm{US\_survey}},{\mathrm{step}}_{\mathrm{standard}},{\mathrm{x\_unit}}_{\mathrm{copper}},{\mathrm{x\_unit}}_{\mathrm{molybdenum}},{\mathrm{yard}}_{\mathrm{US\_survey}},{\mathrm{yard}}_{\mathrm{standard}}$

$2\mathrm{Unit}\left(m\right)+5\mathrm{Unit}\left(\mathrm{ft}\right)$

$2⟦m⟧+5⟦\mathrm{ft}⟧$

The Units[CommandsOnly] subpackage was introduced in Maple 2018.

For more information on Maple 2018 changes, see Updates in Maple 2018.