If you need a serial port on your computer but you don't have one, this USB to serial (RS-232) adapter is an easy solution. To use the adapter, install the appropriate driver and plug it in to your computer's USB port using a USB A to mini-B cable. Now you have a virtual com port!
Parallax designed this adapter using the FTDI chip, FT232RL. This adapter supports multiple operating systems. FTDI provides fully functional drivers, maintaining and improving them as operating systems change.