Aten USB to PDA/Serial (DB9) Adapter w/ PC & Mac Drivers
Amazon.com: Plugable USB to Serial Adapter Compatible with Windows, Mac, Linux (RS-232DB9 DTE Male Connector, Prolific PL2303HX Rev. D Chipset) : Electronics
usb to serial converter - YouTube
USB Serial Adapter – Windows 10 Compatible High-Speed RS232 adapter