Order Co (order company)
Enter a number that, along with order number and order type, uniquely identifies an order document (such as a purchase order, a contract, a sales order, and so on).
If you use the Next Numbers by Company/Fiscal Year facility, the Automatic Next Numbers program (X0010) uses the order company to retrieve the correct next number for that company. If two or more order documents have the same order number and order type, the order company lets you locate the desired document.
If you use the regular Next Numbers facility, the order company is not used to assign a next number. In this case, you probably would not use the order company to locate the document.