I will be starting a project about February that will gather id numbers from read-only RFID tags.
I will keep the id on the tag in a table along with whatever information is associated with that id.
There a a lot of them out there but one very promising looking one is:
http://www.gaorfidassettracking.com/LocateWare_for_Asset_Tracking/index.php
RFID stands for "radio frequency identification." Very similar to using barcodes and barcode readers.