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  2. Dell OptiPlex - Wikipedia

    en.wikipedia.org/wiki/Dell_OptiPlex

    All Models including All-in-ones offer 802.11ax WiFi 6 Options and all Desktop models offer a Serial Port Adapter, which can be expanded with a variety of ports including; Serial Ports, VGA, DisplayPorts, HDMI, and USB Type C alt DisplayPorts.

  3. ThinkCentre M series - Wikipedia

    en.wikipedia.org/wiki/ThinkCentre_M_series

    The M52 desktop was equipped with a 3 GHz Pentium 4 processors, an 80 GB hard disk drive, up to 4 GB of RAM, eight USB 2.0 ports, two serial ports, a Gigabit Ethernet connection, VGA output, and a chassis that did not require tools to open − a toolless chassis. [4]

  4. COM (hardware interface) - Wikipedia

    en.wikipedia.org/wiki/COM_(hardware_interface)

    COM port (DE-9 connector). COM (communication port) [1] [2] is the original, yet still common, name of the serial port interface on PC-compatible computers. It can refer not only to physical ports, but also to emulated ports, such as ports created by Bluetooth or USB adapters.

  5. Serial port - Wikipedia

    en.wikipedia.org/wiki/Serial_port

    The IBM PC implements its serial ports, when present, with one or more UARTs. Very low-cost systems, such as some early home computers, would instead use the CPU to send the data through an output pin, using the bit banging technique. These early home computers often had proprietary serial ports with pinouts and voltage levels incompatible with ...

  6. Data Carrier Detect - Wikipedia

    en.wikipedia.org/wiki/Data_Carrier_Detect

    Frequent use of a serial port is for a direct computer-to-computer connection. This requires an adapter called a null modem, which isn't actually a modem in the traditional sense, but rather a connector plug that simply crosses the complementary pins on two serial ports so the two sides can communicate. A null modem typically connects the DTR ...

  7. Psion Series 7 - Wikipedia

    en.wikipedia.org/wiki/Psion_Series_7

    It can be synchronized to a PC by means of an RS-232 serial port to serial connector, a method that is obsoleted by later standards. The unit has an expansion port for a CompactFlash (CF) II device such as the Hitachi Microdrive. It also has a PC Card expansion port supporting flash storage, compact flash adapters, modems, [1] wireless [2] and ...

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