Using USB-to-Serial Converters for Data Acquisition | Windmill Software
Amazon.com: USBGear 12 inch USB to Serial RS-232 DB-9 Pin Adapter with FTDI Chipset for Windows 10, 8, 7 and Mac Systems - Use for Laptop Serial Port, PDA, GPS, Modems, Routers and More : Electronics
Jihaan USB to RS232 DB9 BF-810 USB to 232 9PIN Cable Modem ISDN Terminal Adapter