Definitions of inventory:

• noun:   making an itemized list of merchandise or supplies on hand

  Example: "The inventory took two days"

• noun:   a detailed list of all the items in stock
• noun:   (accounting) the value of a firm's current assets including raw materials and work in progress and finished goods
• noun:   the merchandise that a shop has on hand

  Example: "They carried a vast inventory of hardware"

• noun:   a collection of resources
• verb:   make or include in an itemized record or report

  Example: "Inventory all books before the end of the year"