The USB to serial adapter has a USB-A port on one end and a serial port on the other. The serial port is most commonly RS232, which is a standard that dates back to the 1960s.

I require the use of a serial port for work, but my laptop didn't come with one.<BR><BR>I got an adapter from work, a Keyspan USA-19HS, but there are currently no drivers for it - none for any ...

The Keyspan USB Adapter 1.2 driver can be downloaded from the Keyspan Web site — it requires Mac OS X 10.1 or higher. Keyspan’s USB Serial Adapter offers a way to connect serial devices to USB ...