Plugable USB to RS-232 DB9 Serial Adapter (Prolific PL2303HX Chipset) – Plugable Technologies
StarTech 1' USB to RS232 Serial Adapter Cable, Black (ICUSB232V2) | Staples
Amazon.com: Tripp Lite Keyspan High-Speed USB to Serial Adapter, PC & Mac, USB-A to DB9 RS232 Male, 3 Foot / 0.91 Meter Cable, 3-Year Warranty (USA-19HS) : Electronics
StarTech.com 1 Port FTDI USB to Serial RS232 Adapter Cable with COM Retention - Add an RS232 serial port with COM retention to your laptop or desktop computer through USB - USB
Looking for drivers for Staples USB to Serial adapter model - Fixya
Allen-Bradley 9300-USBS Remote Access Sub to Serial Adaptor | NorthEast Electrical