...
Items for unit libraries that have preliminary-level Instance records are assigned a storage code for the unit library (See Unit Library storage codes). The storage code is assigned in the Holdings record as a Staff-only Holdings Note (Note type: note), appearing with the Transaction data, as in the below example. Books which are assigned a storage code are placed on the storage sorting truck in the physical processing unit. Like for the catalogers, like the copy-cataloging materials in the above entry.
...
O/K/U Language Storage Codes:Anchor O/K/U O/K/U
O/K/U items that have preliminary-level Instance records are assigned a storage code for the broad language category in which the item is written. See O/K/U language storage codes, with a list of the storage codes and the languages that fall into each. Books which are assigned a storage code are placed on the storage trucks in the physical processing unitsorting truck for the catalogers .
