Hello all.  Richard, you had mentioned you were looking for an alternate name for the serial number field in the Asset Management Database Seminar.  I am taking that seminar right now (it is great, highly recommend it) and building a database to be used to track mechanical equipment in a high rise hotel.  I needed to reserve "serial number" to refer to parts and machines because they are often important when ordering replacement parts.  I also intend to use bar codes in the future so have instead used the term "Identifier". This will allow me to barcode anything.  My intention is to barcode both mechanical equipment and locations.  Guest rooms for instance, will be barcoded and a scan of the bar code will not only open the preventative maintenance form but also reference past maintenance calls so deficiencies can be checked.  This reserves the actual serial numbers of mechanical equipment to differentiate them from other identical model units or validate they are under warranty etc.