To be fair, the only reason I knew of this at all is because of a brief patronage of a library in Belgium during a trip I took in the summer of '99. The comput

To be fair, the only reason I knew of this at all is because of a brief patronage of a library in Belgium during a trip I took in the summer of '99. The computer systems of said library used a bizarre system of time-limited authentication tokens stored on floppy disks that were used during the Windows log-on process. I was curious how it might have worked.