LPT stands for Line Printer Terminal. Its the port where printers usually are located (look on the back of your computer for a 25 pin female port). If you have a printer look at the two ends of the cable, both different.

Parallel computer connections traditionally have used the Centronics parallel interface for printer communication. A newer standard called EPP/ECP supports the older interface while providing faster communication for a range of devices, including scanners and video cameras.