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Insignia™ 1.3' USB-to-RS-232 (DB9) PDA/Serial Adapter Cable, with Prolific Chipset Black NS-PU99501 - Best Buy
Keyspan High Speed USB Serial Adapter - 230 Kbps | Dell USA
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2-Port Professional RS-232 USB 2.0 to Serial Adapter 5ft.
USB-to-serial adapter - Wikipedia
Plugable USB to RS-232 DB9 Serial Adapter (Prolific PL2303GT Chipset) – Plugable Technologies
Basic USB-to-Serial adapter from U.S. Converters
Meade USB to RS-232 Serial Adapter
C2G 1.5ft USB to Serial Cable USB to DB9 Serial RS232 Cable MM Convert a DB9 RS232 serial device to USB great for PDAs digital cameras and many other peripherals - Office
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USB to Serial Adapter Cable
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USB 2.0 RS-232 Serial Adapter with LED Indicators
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1 Port USB 2.0 to Serial Adapter Cable - Serial Cards & Adapters | Add-on Cards & Peripherals | StarTech.com Europe
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USB-A to Serial Adapter Cable - RS232, DB9, 5-ft. | Eaton
Manhattan PL-2303 USB to Serial Converter (205146)
