Library catalogues are relatively antiquated inventory control systems. Items are assigned locations and call numbers with sets of possible status' (signed out, lost, intransit, etc.). What it will not tell you is the item you want is in the sorting area, mis-shelved, or sitting on a table in the computing commons. If we RFID tagged everything, linked "real" item locations to BIB records, we could drastically improve customer service. Everyone has experienced the frustration of an OPAC stating an item is in location A only to find out it is not. OPAC data lacks currency and precision. RFID could change that but thus far I have not seen libraries use RFID to its potential.