Provide the full forms for the following:
$(i)$ $CGPM$
$(ii)$ $amu$
$(iii)$ $u$
$(i)$ $CGPM$
$(ii)$ $amu$
$(iii)$ $u$
(N/A) $(i)$ $CGPM$: $\text{Conférence Générale des Poids et Mesures}$ (General Conference on Weights and Measures)
$(ii)$ $amu$: $\text{Atomic Mass Unit}$
$(iii)$ $u$: $\text{Unified Mass}$
$(ii)$ $amu$: $\text{Atomic Mass Unit}$
$(iii)$ $u$: $\text{Unified Mass}$
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