For example, you can use a serial port to link a heart monitor to a treadmill, or a cash register with a barcode scanner. Industrial sensors and actuators also frequently use serial ports to ...

Serial barcode scanners connect directly to the system through the serial (RS232) port on the back of the computer. Data from scans is not automatically recognized and must be converted.

The serial port is most commonly RS232 ... In general, these adapters are used for connecting devices, such as printers, scanners, modems, scales, and GPS trackers. They are also commonly used ...

But tracking down devices that still use serial port connections isn't so hard ... Analyzing a database of a year's worth of Internet scan results he's assembled known as Critical.io, as well ...