If the value of the gift exceeds $100, you will be required to pay duty. If you have goods you intend to sell in the U.S., they will most likely be subject to duty, unless they are eligible for duty-free treatment under an international trade agreement (GSP, NAFTA, etc.).
Specialization of labor is a powerful force in an economy, benefiting small and large businesses alike. Workers produce more when they occupy specialized roles, so businesses can offer higher quality products at lower prices.
specialization. 1  the act of specializing, or pursuing a particular line of study or work: Medical students with high student loans often feel driven into specialization. 2. Biology. the adaptation of an organism or organ to a special function or environment: