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![Amazon.com: DELL Optiplex, Intel Core 2 Duo 2600 MHz, 500Gig Serial ATA HDD, 2048mb Memory, DVD ROM, Windows XP Professional-Power Cord (Renewed)'] : Electronics](https://m.media-amazon.com/images/I/71uvvjdJxcL.jpg "Amazon.com: DELL Optiplex, Intel Core 2 Duo 2600 MHz, 500Gig Serial ATA HDD, 2048mb Memory, DVD ROM, Windows XP Professional-Power Cord (Renewed)'] : Electronics")
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Amazon.com: Startech Add Four Rs232 Serial Ports To Any Notebook Or Desktop Computer Using A Single U : Electronics
Amazon.com: Cable Matters USB to Serial Adapter Cable (USB to RS232, USB to DB9) 3 Feet : Electronics
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Amazon.com: StarTech.com USB to Serial Adapter - 3 ft / 1m - with DB9 to DB25 Pin Adapter - Prolific PL-2303 - USB to RS232 Adapter Cable (ICUSB232DB25),Gray : Electronics
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