What are the "other things constant" when drawing a demand curve? What are the "other things constant" when drawing a supply curve?

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The Answer is In the case of the demand curve, the list of "other things constant" refers to anything (other than price) that influences a person's decision to buy something. The text lists four important "other things": 1) society's income; 2) the prices of other goods; 3) taxes; and 4) expectations.
In the case of the supply curve, the list of "other things constant" refers to anything (other than price) that influences a firm's decision to sell something. The text lists four important "other things": 1) price of inputs; 2) technology; 3) expectations; and 4) taxes and subsidies.

What Are the "Other Things Constant" When Drawing a Demand