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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 Adapter
36 inch USB to Serial RS232 FTDI professional adapter
USB to RS-232 Adapter (35cm) - UC232A, ATEN Converters | ATEN Corporate Headquarters
USB to RS-232 Adapter (35cm) - UC232A, ATEN Converters | ATEN U.S.A.