Final answer:
The statement is false. Social security numbering and family numbering are not variations of unit numbering systems.
Step-by-step explanation:
The statement is false. The two variations of unit numbering systems mentioned in the question, social security numbering and family numbering, are not actually unit numbering systems. Social security numbering refers to the unique identification numbers assigned to individuals for the purpose of tracking their earnings and benefits in the United States. Family numbering, on the other hand, does not exist as a widely recognized unit numbering system. Therefore, neither social security numbering nor family numbering can be considered variations of unit numbering systems.