The classes of goods are mutually exclusive. For example, the same property cannot simultaneously be both equipment and inventory. In borderline cases-a physician's car or a farmer's truck that might be either consumer goods or equipment-the principal use to which the property is put is determinative. Goods can fall into different classes at different times. For example, a radio may be inventory in the hands of a dealer and consumer goods in the hands of a consumer. As under former Article 9, goods are "equipment" if they do not fall into another category.

The definition of "consumer goods" follows former Section 9- 109. The classification turns on whether the debtor uses or bought the goods for use "primarily for personal, family, or household purposes."

Goods are inventory if they are leased by a lessor or held by a person for sale or lease. The revised definition of "inventory" makes clear that the term includes goods leased by the debtor to others as well as goods held for lease. (The same result should have obtained under the former definition.) Goods to be furnished or furnished under a service contract, raw materials, and work in process also are inventory. Implicit in the definition is the criterion that the sales or leases are or will be in the ordinary course of business. For example, machinery used in manufacturing is equipment, not inventory, even though it is the policy of the debtor to sell machinery when it becomes obsolete or worn. Inventory also includes goods that are consumed in a business (e.g., fuel used in operations). In general, goods used in a business are equipment if they are fixed assets or have, as identifiable units, a relatively long period of use, but are inventory, even though not held for sale or lease, if they are used up or consumed in a short period of time in producing a product or providing a service.

Goods are "farm products" if the debtor is engaged in farming operations with respect to the goods. Animals in a herd of livestock are covered whether the debtor acquires them by purchase or as a result of natural increase. Products of crops or livestock remain farm products as long as they have not been subjected to a manufacturing process. The terms "crops" and "livestock" are not defined. The new definition of "farming operations" is for clarification only.

Crops, livestock, and their products cease to be "farm products" when the debtor ceases to be engaged in farming operations with respect to them. If, for example, they come into