Parallel Port device
Parallel Port Software Security Device (SSD)
Attach the SSD to your parallel port and install the driver required for your version of windows as outlined below.
If you have a printer attached to your computer, connect the SSD to the parallel port on your computer and then plug your printer cable into the SSD. The SSD acts as a pass-thru for printer jobs.
If you have more than one parallel port, you may attach the SSD to any of them if they are logically "LPT1, LPT2, LPT3, or LPT4".
USB Port device
USB Software Security Device (SSD)
Attach the USB SSD to one of your PC's USB ports after you've installed the driver for the USB key.