1. 常用 short form
UOM = Unit of measurement (https://www.urmc.rochester.edu/purchasing/documents/um.pdf)
PO = Purchase Order
GR/GRN = Good Received/Good Received Note
PI = Purchase Invoice
PR = Purchase Return
SO = Sales Order
DO = Delivery Order
DR = Delivery Return
IV = Invoice
CN = Credit Note
DN = Debit Note