Can I Install my Copy of QB Point of Sale on More Than One Workstation if I Only Have a Single License?

Yes, but your user license permits use on only one computer at a time.  For example, you could install a single copy of QuickBooks Point of Sale on both a front register and a back office computer, but you would only be able to use one at a time. To use both at the same time you will need to purchase an additional copy of QuickBooks Point of Sale.