I just spent the last 20 minutes changing my server scripts and database to record 'licenseKey' instead of 'serialNumber'. I am so happy. The latter was a vestige of my days with eSellerate, who use this completely inappropriate term, and I've always hated it. Purchasers or my next product will now get a "License Key".
For those of you who have never worked in a factory, Serial Numbers are assigned serially, as in 00001, 00002, 00003, etc. Old Windows applications usually had "serial numbers". "Serials" are also the subject of web searches by not-so-nice users, many of whom spell it "serialz".
License Keys are numbers which are purchased to unlock a Mac application. Hooray for "License Key"!
Jerry Krinock