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Amazon.com: StarTech.com 1-port PCI Express RS232 Serial Adapter Card - PCIe RS232 Serial Host Controller Card - PCIe to Serial DB9 - 16550 UART - Low Profile Expansion Card - Windows & Linux (PEX1S553LP) : Electronics
StarTech.com Parallel/serial combo card - PCI - parallel, serial - 3 ports - Add a parallel port and two RS-232 serial ports to your PC through a PCI expansion slot - serial