049 field codes 
Automatically add holdings and items by using these 049 field codes in the OCLC record. First update our holdings (if doing manually), then in 049__ AUMM accordingly :
 AUMBK = monographs
 
 AUMCD = CDs
 
 AUMDDR = SCUA items from the East German collection
 
 AUMDVD = DVDs
 
 AUMETD = used for current dissertation harvests
 
 AUMLP = LPs
 
 AUMGBK = gift monographs
 
 AUMSCA = SCUA finding aids
 
 AUMSEL = for SEL : UMSCI books in the general collection
 
[UMass created the following 049 code for the Ren Center]