Final answer:
A U.S. business purchasing computers from a domestic manufacturer is counted in the investment sector of GDP, which includes business expenditures on long-term goods.
Step-by-step explanation:
The value of the transaction of a U.S. business buying new computers for its office workers from a U.S. computer manufacturer would be included in the investment sector of the components of GDP. The investment component measures business spending on capital goods that will be used for future production, such as machinery, buildings, and in this case, computers. This purchase represents business investment because it is an expenditure on goods that will be used for more than one year and are not intended for immediate resale.