*This is the most common Application
You can buy the USB to Parallel adapter
seperately if you don'd need the Parallel to Mini Centronics adapter included in this kit.
If you find that your new computer doesn't have a standard parallel port, this USB to Mini-Centronics (IEEE 1284-C or IEEE 1284C) combo cable set is perfect to connect these older printers to a USB only computer.
Installation is very easy and straightforward. Simply attach the USB to parallel cable to the mini-centronics adapter and plug each end to the printer and computer. If you're using Windows XP or Vista, the USB drivers install automatically. Then, you'll need to install the individual printer drivers, most of which are built into Windows XP.
Please note:
These adapters will work with Multi-Function or All-In-One printers, but only for printing (in other words, they won't allow you to use the faxing or scanning functions). Also, they do not work with anything other than printers. They will not work with other parallel devices.
Compatible Models:

HP LaserJet 1100 Series (not 1100A)
-

HP LaserJet 3200 Series*
-

HP LaserJet 4500 and 4550 Series
-

HP LaserJet 4600 and 4650 Series
-

HP LaserJet 4700 Series*
-

HP LaserJet 5500 and 5550 Series
-

HP LaserJet 9000 Series
* This printer also has a USB port
Each kit includes all you need to connect a USB only computer to a mini-centronics printer.
NOTE: Your printer must also have drivers that are compatible with your operating system.