If gram isn't part of the SI system, then how is it that SI recognizes its symbol?

Question

If gram is of the CGS system of measurement (which is a variant of the metric system, which is still used), then how does SI recognize its symbol? When it is not part of SI. What does this statement from this source mean?

Source: https://en.wikipedia.org/wiki/Gram

DanielC · Answer

As it is known, in 1960 BIPM officially adopted MKS over CGS for the so-called system of base units, but that didn't mean the gram was deemed obsolete, nor eliminated from SI, it was just no longer a base unit. The correct phrasing would be: "In SI, mass is officially reported in base units of kilograms (in the official MKS system), but also in grams (as part of the alternative CGS system)."

Answered by DanielC on May 14, 2021

If gram isn't part of the SI system, then how is it that SI recognizes its symbol?

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